Workout Mathematics Grade 238NA_Mth_G3_SE_FM_PDF_.indd 1 3 8/6/07 8:51:07 AM Workout, Mathematics, Grade 3 238NA ISBN-10: 1-59823-950-3 ISBN-13: 978-1-59823-950-8 Cover Image: © SWP Incorporated/Brand X Pictures/Jupiter Images Triumph Learning® 136 Madison Avenue, 7th Floor, New York, NY 10016 A Haights Cross Communications, Inc. company © 2008 Triumph Learning, LLC All rights reserved. No part of this publication may be reproduced in whole or in part, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording or otherwise, without written permission from the publisher. Printed in the United States of America. 10 9 8 238NA_Mth_G3_SE_FM_RP.indd 2 12/29/10 2:49:40 PM Dear Student, Are you a math champion? You will be when you use Workout! Getting in shape is easy. Just complete the lessons inside. So, on your mark, get set – Work OUT! This book belongs to ______________________________ 238NA_Mth_G3_SE_FM_PDF_.indd 3 8/6/07 8:51:09 AM Table of Contents Numbers and Operations Lesson 1 Understanding Place Value. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6 Lesson 2 Even and Odd Numbers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10 Lesson 3 Comparing and Ordering Whole Numbers . . . . . . . . . . . . . . . . . . . . . .14 Lesson 4 Models for Fractions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18 Lesson 5 Coins and Making Change . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22 Lesson 6 Addition-Subtraction Fact Families . . . . . . . . . . . . . . . . . . . . . . . . . . . .26 Lesson 7 Multiplication as Repeated Addition . . . . . . . . . . . . . . . . . . . . . . . . . . .30 Lesson 8 How to Solve Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34 Lesson 9 Solving Problems by Adding. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38 Lesson 10 Solving Problems by Subtracting . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42 Lesson 11 Solving Problems with Multiplication. . . . . . . . . . . . . . . . . . . . . . . . . . .46 Lesson 12 Rounding to the Nearest 10 or 100 . . . . . . . . . . . . . . . . . . . . . . . . . . .50 Lesson 13 Using Estimation to Solve Problems. . . . . . . . . . . . . . . . . . . . . . . . . . .54 Measurement Lesson 14 Units of Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58 Lesson 15 Estimating Length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62 Lesson 16 Estimating Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66 Lesson 17 Estimating Capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .70 Lesson 18 Using Rulers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .74 Lesson 19 Comparing and Ordering Objects. . . . . . . . . . . . . . . . . . . . . . . . . . . . .78 Lesson 20 Telling Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .82 Lesson 21 Elapsed Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .86 4 238NA_Mth_G3_SE_FM_PDF_.indd 4 8/6/07 8:51:11 AM Geometry Lesson 22 Two-Dimensional Figures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .90 Lesson 23 Three-Dimensional Figures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .94 Lesson 24 Symmetry. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .98 Algebraic Concepts Lesson 25 Patterns with Numbers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .102 Lesson 26 Patterns with Shapes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .106 Lesson 27 Completing Number Sentences . . . . . . . . . . . . . . . . . . . . . . . . . . . . .110 Lesson 28 Solving Problems with Number Sentences. . . . . . . . . . . . . . . . . . . . .114 Statistics and Probability Lesson 29 Bar Graphs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .118 Lesson 30 Tables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .122 Math Words . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .126 5 238NA_Mth_G3_SE_FM_PDF_.indd 5 8/6/07 8:51:12 AM Numbers and Operations LESSON 1 Understanding Place Value When you use place value, remember these words: expanded form writing numbers by adding the values of the digits place value the value of a position in a number standard form writing numbers with digits 745 is in standard form 700 40 5 is in expanded form Write 3,924 in expanded form. Step 1 Step 2 REMEMBER A place value-chart shows the value of each digit in a number. Write the number in a place-value chart. thousands hundreds 3 9 tens ones Use the chart to write the value of each number. thousands hundreds tens ones 3 9 2 4 3,000 900 THINK 9 is in the hundreds place. 9 hundreds = 900 So, the number in expanded form is . 6 238NA_Mth_G3_SE_Less 01-09_PDF_.6 6 8/6/07 8:43:59 AM Write these numbers in standard form. 1. 300 4 3. 2,000 500 60 1 4. two hundred nine 5. one thousand, eight hundred sixty-seven 6. 2. 700 80 5 five thousand, two hundred twenty 1. Numbers and Operations Lesson 1: Understanding Place Value What digit is in the tens place? 0, 3, or 4? 7. How can you show 8 hundreds? 800, 80, or 8? Write these numbers in expanded form. 7. 8. 816 7,950 Write the number in words. 9. 9. Say the number softy to yourself. What is the thousands part? 5 thousand or 54 thousand? 2,704 10. Solve. 10. In 2006, the population of Forest County, Pennsylvania was six thousand, five hundred six people. What is this number in standard form? In a 4-digit number, where is the thousands place? 1st or 4th? 7 238NA_Mth_G3_SE_Less 01-09_PDF_.7 7 8/6/07 8:44:01 AM Numbers and Operations Circle the answer for each question. 1. 2. 3. How many tens are there in 1,475? 4. How do you say the number 7,003? A. 5 tens A. seven thousand, three B. 4 tens B. seven thousand, thirty C. 7 tens C. seventy-three D. 75 tens D. seven oh three Which number shows 6,000 500 20 8? 5. What is the value of the 4 in 4,316? A. 6,825 A. 4 B. 6,582 B. 40 C. 6,528 C. 400 D. 6,258 D. 4,000 There are five hundred sixtytwo students at Robinson School. Which shows this number in standard form? 6. Trevor said this number: five thousand, seven hundred thirty-two. Which shows Trevor’s number? A. 265 A. 5,723 B. 526 B. 5,732 C. 560 C. 5,733 D. 562 D. 5,700,032 8 238NA_Mth_G3_SE_Less 01-09_PDF_.8 8 8/6/07 8:44:05 AM 7. The principal said four hundred eight cans were collected during the can drive. Write this number in standard form. 8. Kara wrote this number in expanded form: Numbers and Operations Lesson 1: Understanding Place Value 6,000 20 9 Part A. Write the number in standard form. Part B. Explain how you used place value to write the number in standard form. Math Words Fill in the blanks. 9. The number 352 is written in 10. In the number 8,624, the digit 8 is in the 11. 2,000 800 10 9 is the form. place. form of 2,819. 9 238NA_Mth_G3_SE_Less 01-09_PDF_.9 9 8/6/07 8:44:06 AM Numbers and Operations LESSON Even and Odd Numbers 2 When you use even and odd numbers, remember these words: even numbers end in 0, 2, 4, 6, or 8 odd numbers end in 1, 3, 5, 7, or 9 8, 24, and 78 are all even numbers 5, 37, and 89 are all odd numbers Find the odd numbers between 64 and 74. Step 1 Write the numbers between 64 and 74. 65, 66, 67, 68, 69, 70, 71, 72, 73 Step 2 Circle the odd numbers. Step 3 Count how many numbers you circled. There are So, there are THINK Count by 1’s to write the missing numbers. REMEMBER Any numbers that end in 1, 3, 5, 7, or 9 are odd numbers. circled numbers. odd numbers between 64 and 74. 10 238NA_Mth_G3_SE_Less 01-09_PDF_.10 10 8/6/07 8:44:06 AM Write odd or even for each number. 1. 58 2. 3. 73 26 1. Numbers and Operations Lesson 2: Even and Odd Numbers Is 8 odd or even? 4. 12 5. 65 6. 87 7. 41 8. 90 9. 39 Write if the sum or difference of each problem is odd or even. 10. 10. 25 42 11. 54 28 Solve. 12. 13. What is the ones digit in the sum? 6 or 7? How many even numbers are between 41 and 53? 12. Mr. Wilson’s class is learning about odd and even numbers. Jeremy says that 83 is an even number. Is Jeremy right? Explain. What digits do all even numbers end in? 0, 2, 4, 6, 8 or 1, 3, 5, 7, 9? 11 238NA_Mth_G3_SE_Less 01-09_PDF_.11 11 8/6/07 8:44:07 AM Numbers and Operations Circle the answer for each question. 1. 2. 3. Which is an odd number? 4. How many odd numbers are between 38 and 50? A. 50 B. 65 A. 7 C. 28 B. 6 D. 34 C. 5 D. 4 Which is an even number? A. 19 B. 57 C. 83 D. 96 5. Which sentence best describes this group of numbers? 84, 32, 70, 68, 42 A. They are not in standard form. B. They are all odd. C. They are all even. D. Some are even and some are odd. 6. How many even numbers are between 61 and 71? A. 4 B. 5 C. 6 D. 7 73 is an odd number because it ends in 3. What kind of number comes right after 73? A. even number B. odd number C. cannot tell D. a number ending in 0 12 238NA_Mth_G3_SE_Less 01-09_PDF_.12 12 8/6/07 8:44:09 AM 7. Greta is given number cards for the numbers between 25 and 40. Part A. List all of the odd numbers in Greta’s set of number cards. Part B. Use what you know about even and odd numbers to explain why your answer is correct. Math Words Numbers and Operations Lesson 2: Even and Odd Numbers Choose words from the box to label each column of the table. even numbers even and odd numbers odd numbers numbers in expanded form 8. 13 238NA_Mth_G3_SE_Less 01-09_PDF_.13 13 8/6/07 8:44:10 AM Numbers and Operations Comparing and Ordering Whole Numbers LESSON 3 When you compare whole numbers, remember these symbols: is greater than is less than is equal to Order 3,351, 3,263, and 3,347 from least to greatest. Step 1 Write the numbers in three rows with their places lined up. 3 , 3 3 , 2 5 6 1 3 , THINK Always Step 2 Compare the thousands digits. The thousands digit of all three numbers is 3. So, you cannot order the numbers yet. Step 3 Compare the hundreds digits. The number with the least hundreds digit is 3,263. is the least number. Step 4 Compare the tens digits of the two remaining numbers. The tens digit of 3,351 is . The tens digit of 3,347 is . That means the greatest number is . So, from least to greatest, the numbers are . compare numbers from left to right. , , 14 238NA_Mth_G3_SE_Less 01-09_PDF_.14 14 8/6/07 8:44:10 AM Compare. Write , , or . 1. 3. 4,581 3,824 2. 5,488 4. 3,824 8,763 4,035 8,495 1. 3,045 Which symbol means less than? , , or ? Numbers and Operations Lesson 3: Comparing and Ordering Whole Numbers Order the numbers from least to greatest. 5. 6. 5. 485, 398, 424 To compare numbers, where do you start? Left or right? 2,091; 2,910; 2,190 Order the numbers from greatest to least. 7. 8. 7. 583, 576, 972 8,165; 6,184; 8,976 Use the table for Questions 9 and 10. Day Water Park Visitors Monday Tuesday Wednesday Thursday 5,785 5,690 5,609 5,734 9. On which day did the greatest number of people go to the water park? 10. On which day did fewer people go to the water park than on Tuesday? Which digits will you compare first? Hundreds or ones? 9. Which digits will you compare first? Thousands, tens, or ones? 15 238NA_Mth_G3_SE_Less 01-09_PDF_.15 15 8/6/07 8:44:14 AM Numbers and Operations Circle the answer for each question. 1. 2. Which of the following numbers is the greatest? Which set of numbers is in order from least to greatest? A. 3,519 A. 8,073; 7,084; 7,809 B. 3,915 B. 7,800; 7,084; 8,073 C. 3,159 C. 7,084; 8,073; 7,809 D. 3,951 D. 7,084; 7,809; 8,073 Which symbol makes the number sentence true? 5,683 3. 4. 5. What is the greatest number that can be made with these digits? 5,615 5 4 A. A. 5,427 B. B. 7,245 C. C. 7,542 D. D. 2,457 Jake says there are between 7,660 and 7,668 students in his school district. How many students could be in Jake’s school district? A. 7,606 B. 7,639 C. 7,663 D. 7,686 6. 7 2 The Nile River in Africa is 4,160 miles long. The Chang River in Asia is 3,940 miles long. The Amazon River in South America is 4,000 miles long. Which shows the rivers in order from longest to shortest? A. Chang, Amazon, Nile B. Nile, Amazon, Chang C. Amazon, Nile, Chang D. Nile, Chang, Amazon 16 238NA_Mth_G3_SE_Less 01-09_PDF_.16 16 8/6/07 8:44:16 AM 7. What is the least number that can be made using these digits? Use each digit only once. 6 8. 5 1 8 Numbers and Operations Lesson 3: Comparing and Ordering Whole Numbers Macy needs to order these numbers from greatest to least: 4,823 4,832 4,382 Part A. Order the numbers from greatest to least. Part B. Explain how you used place value to order the numbers. -ATH 7ORDS Draw a line to match each symbol to its meaning. 9. is equal to 10. is less than 11. is greater than 17 238NA_Mth_G3_SE_Less 01-09_PDF_.17 17 8/6/07 8:44:17 AM Numbers and Operations LESSON Models for Fractions 4 When you model fractions, remember these words: fraction names part of a whole or part of a set numerator the top number of a fraction denominator the bottom number of a fraction; it tells the number of equal parts _3 4 numerator denominator Write a fraction to name the shaded part of the set. Step 1 Step 2 Count the total number of circles. REMEMBER Count both There are 5 circles. the white circles and the shaded circles. Count the number of shaded circles. There are Step 3 shaded circles. Write the fraction. Number of Shaded Circles __________________ ___ Total Number of Circles So, the fraction names the shaded part of the set. 18 238NA_Mth_G3_SE_Less 01-09_PDF_.18 18 8/6/07 8:44:17 AM Write a fraction for the shaded part. 1. 2. 1. Numbers and Operations Lesson 4: Models for Fractions How many equal parts are there? 2 or 4? 3. 4. Color each picture to show the fraction. 5. 5. _1 3 6. _5 8 Solve. 7. 8. There are 5 red apples and 3 green apples in a bowl. What fraction shows the number of green apples? The Murphy family buys a 10-slice pizza for dinner. They eat 7 slices. What fraction shows how much pizza they ate? What is the numerator of the fraction? 1 or 3? 7. What is the total number of apples? 3, 5, or 8? 19 238NA_Mth_G3_SE_Less 01-09_PDF_.19 19 8/6/07 8:44:18 AM Numbers and Operations Circle the answer for each question. 1. 2. 3. What fraction of the figure is shaded? 4. What fraction of the circles are shaded? A. _2 5 C. _5 5 A. _1 6 C. _5 6 B. _3 5 D. _5 2 B. _3 6 D. _6 6 What fraction of the stars are shaded? A. _3 1 B. _2 3 C. _3 3 D. _1 3 A sandwich is cut into 4 equal pieces. Melody eats 3 pieces. What fraction shows the amount of the sandwich Melody ate? A. _1 4 C. _4 1 B. _3 4 D. _4 3 5. 6. What fraction of the figure is shaded? A. _1 2 C. _2 2 B. _2 1 D. _3 2 There are 6 green peppers and 4 red peppers at the store. What fraction shows the number of red peppers? A. _2 6 C. 4 __ 10 B. _4 6 D. 6 __ 10 20 238NA_Mth_G3_SE_Less 01-09_PDF_.20 20 8/6/07 8:44:20 AM 7. Izzy drew a circle. Part A. Shade _64 of Izzy’s circle. Part B. Use words and/or numbers to explain your answer. Math Words Numbers and Operations Lesson 4: Models for Fractions Label the diagrams using words from the box. 8. 3 _ 8 fraction 9. 3 _ 8 denominator 10. 3 _ 8 numerator 21 238NA_Mth_G3_SE_Less 01-09_PDF_.21 21 8/6/07 8:44:21 AM Numbers and Operations LESSON Coins and Making Change 5 When counting on to find the value of a set of money, start with the bill or coin of the greatest value. Nathan bought a board game for $3.47. He paid with a $5 bill. Find the bills and coins Nathan will get back as change. Find how much change Nathan will get back. $5. 0 0 REMEMBER To find change, subtract the cost of the item from the amount used to pay for the item. – $3. 4 7 $ $ . $ . $ . UNUM • UNIT CEN T UNIT $1.25 • NE O $1 .00 CEN • ICA ICA O NE ATES oF STE PLURIBUS A ER UNUM • ER • M • M ATES oF STE PLURIBUS A ED Make the change with bills and coins. ED Step 2 . T Step 1 $ . total So, Nathan will get dollar bill, pennies back as change. quarters, and 22 238NA_Mth_G3_SE_Less 01-09_PDF_.22 22 8/6/07 8:44:22 AM Find the value of each set. 1. BU S U N URI UM PL UNITED ERICA M O N T I C E L L O D E DIM FI VE CENT S What is the value of 1 quarter and 1 dime? 30¢ or 35¢? CA IT UN •O NE EP LUR1 9 9 9 NUM ABUS U E M VIRTUE LIBERTY INDEPENDENCE ATES OF A ST ER I SYLVAN NN IA PE 1787 E• 1. Numbers and Operations Lesson 5: Coins and Making Change M STA TES OF A total BU S U N URI UM PL ATES oF STE PLURIBUS A • E CA S M STA TES OF A NE CEN T VE CENT ER I FI O IT UN M O N T I C E L L O D ICA UNIT UNUM • ER • M E ED 2. total Find the total amount of change. List the bills and coins that could be given as change. 3. 5. Price: $1.25 Amount given: $2.00 4. Price: $4.18 Amount given: $5.00 6. Price: $7.83 Amount given: $10.00 Do you add or subtract to find the amount of change? Price: $7.55 Amount given: $10.00 Solve. 7. 3. Robin bought a book for $11.49. She paid using three $5 bills. What bills and coins could Robin get back? 7. What is the value of three $5 bills? $5, $10, or $15? 23 238NA_Mth_G3_SE_Less 01-09_PDF_.23 23 8/6/07 8:44:26 AM Numbers and Operations Circle the answer for each question. 1. What is the value of this set of money? Samantha bought a carton of juice for $2.29. She paid with a $5 bill. Which choice shows the bills and coins he could receive as change? A. ATES oF STE PLURIBUS A • ICA UNIT UNUM • ER • M ED SYLVAN NN IA PE 1787 VIRTUE LIBERTY INDEPENDENCE 3. EP LUR1 9 9 9 NUM ABUS U 2. A. $3.62 B. $2.67 C. $2.62 D. $2.57 B. CEN T O NE C. D. What is the value of this set of money? • DIM ICA BU S U N URI UM PL Jeff paid $2.38 for a pair of gloves with three $1 bills. Which choice lists the coins he could have received? CEN IT UN M O N T I C E L L O E D A. $1.41 B. $1.36 C. $5.36 D. $5.41 FI VE CENT S CA T O NE E ER I UNIT UNUM • ER • M ED •O NE ATES oF STE PLURIBUS A E• ERICA UNITED M ATES OF A ST 4. M STA TES OF A A. 2 quarters, 1 dime, and 2 pennies B. 2 dimes, 2 pennies, and 1 quarter C. 1 nickel, 1 dime, 2 pennies, and 1 quarter D. 2 pennies, 3 dimes, and 4 nickels 24 238NA_Mth_G3_SE_Less 01-09_PDF_.24 24 8/6/07 8:44:36 AM 5. Cherisa pays $3.35 for a hamburger with a $5 bill. Part A. Name the bills and coins Cherisa could receive as change. Part B. Use what you know about making change to explain why your answer is correct. Math Words Numbers and Operations Lesson 5: Coins and Making Change Fill in the blanks. 6. To find change, pay for the item. 7. $2.96 can be shown using and penny. 8. Two $1 bills, 2 quarters, 1 nickel, and 3 pennies equals $ . . the cost of the item from the amount used to $1 bills, quarters, dimes, 25 238NA_Mth_G3_SE_Less 01-09_PDF_.25 25 8/6/07 8:45:00 AM Numbers and Operations Addition-Subtraction Fact Families LESSON 6 When you use fact families, remember this word: fact family a set of related addition and subtraction number sentences Find the three facts related to 7 4 11. Step 1 will have 2 addition and 2 subtraction facts. Find the other addition fact. 4 Step 2 THINK This fact family 11 Write the subtraction facts. 11 7 4 REMEMBER The missing 11 Step 3 numbers are the other two numbers from the addition facts. Check that four facts use the same numbers. The numbers are , , and So, the three facts related to 7 4 11 are , and . . , 26 238NA_Mth_G3_SE_Less 01-09_PDF_.26 26 8/6/07 8:45:00 AM Write an addition-subtraction fact family for each set of numbers. 1. 2. 3, 9, 12 7, 8, 15 1. Numbers and Operations Lesson 6: Addition-Subtraction Fact Families Which number will be the sum? 3 or 12? Find the missing number in each fact family. 3. 5 12 4. 5 12 12 5 12 67 3. 76 What number plus 5 equals 12? 7, 8, or 9? 7 6 5 6 7 Write a related subtraction fact for each addition fact. 5. 84 6. 89 Write a related addition fact for each subtraction fact. 7. 15 6 8. 14 5 7. What number do you add to 6 to equal 15? 5, 7, or 9? 27 238NA_Mth_G3_SE_Less 01-09_PDF_.27 27 8/6/07 8:45:01 AM Numbers and Operations Circle the answer for each question. 1. Which addition fact is related to this subtraction fact? 4. Which subtraction fact is related to this addition fact? 13 8 2. 3. 48 A. 13 8 21 A. 844 B. 8 4 12 B. 12 4 8 C. 7 6 23 C. 12 6 6 D. 5 8 13 D. 12 3 9 Which set of numbers can be used to make an additionsubtraction fact family? A. 5, 7, 9 C. 5, 7, 12 B. 3, 9, 11 D. 4, 8, 8 What are the other members of the fact family that includes the addition fact 9 2 11? A. 2 9 11, 11 2 9, 11 9 2 B. 2 9 11, 9 2 7, 725 C. 2 11 13, 13 9 4, 11 2 9 D. 2 9 11, 11 2 13, 2 11 13 5. and are numbers in The the fact family shown below. 17 17 17 17 A. 6 and 7 B. 7 and 8 C. 8 and 9 D. 9 and 10 28 238NA_Mth_G3_SE_Less 01-09_PDF_.28 28 8/6/07 8:45:04 AM 6. Kendra wrote an addition-subtraction fact family using the numbers 3, 8, and 11. Write the facts in her fact family. 7. The fact family 3 3 6 and 6 3 3 only has two number sentences. Part A. Write another addition-subtraction fact family that only has two number sentences. Part B. Explain why there are only two number sentences in your fact family. Math Words 8. Numbers and Operations Lesson 6: Addition-Subtraction Fact Families Write fact family next to the set of facts that shows a fact family. Cross out the set of facts that does not show a fact family. 8 5 13 5 8 13 13 8 5 13 5 8 9. 7 3 10 5 5 10 10 3 7 10 5 5 29 238NA_Mth_G3_SE_Less 01-09_PDF_.29 29 8/6/07 8:45:04 AM Numbers and Operations Multiplication as Repeated Addition LESSON 7 You can use arrays to model multiplication facts. What multiplication fact does the array show? Step 1 REMEMBER Rows Count the number of rows. go across. There are 4 rows. Step 2 Count the squares in each row. There are 5 squares in one row. Step 3 Use repeated addition to find the total. THINK The array 5555 Step 4 shows 4 groups of 5. Write the multiplication fact. rows So, the array shows squares in each row total number . 30 238NA_Mth_G3_SE_Less 01-09_PDF_.30 30 8/6/07 8:45:05 AM Complete each set. 1. groups of 2. 1. Numbers and Operations Lesson 7: Multiplication as Repeated Addition How many groups are there? 3, 4, or 12? groups of Write a repeated addition sentence and a multiplication sentence for each array. 3. 3. How many groups are there? 6, 7, or 42? 4. 5. Write a multiplication sentence for each. 5. 8 8 8 24 6. 33333 3 18 How can you draw a picture to solve this problem? 31 238NA_Mth_G3_SE_Less 01-09_PDF_.31 31 8/6/07 8:45:06 AM Numbers and Operations Circle the answer for each question. 1. Which array shows 2 6 12? 3. Which multiplication fact does the array show? A. B. C. D. 2. Which tells how many hearts are in the array? 4. A. 4 7 28 B. 4 8 32 C. 7 3 21 D. 7 5 35 Which is another way to show 3 3 3 3 3? A. 35 B. 33 A. 55 C. 55 B. 22 D. 53 C. 55 D. 22 5. Which is another way to show 2 3? A. 33 B. 23 C. 22 D. 333 32 238NA_Mth_G3_SE_Less 01-09_PDF_.32 32 8/6/07 8:45:10 AM 6. Topher used the array shown below. Part A. Write an addition sentence and a multiplication sentence for Topher’s array. Part B. Explain why the number sentences you wrote are correct. -ATH 7ORDS Numbers and Operations Lesson 7: Multiplication as Repeated Addition Fill in the blanks with add, subtract, or multiply. 7. To find the total of groups of different sizes, 8. To find a difference, 9. To find the total when given equal groups, . . . 33 238NA_Mth_G3_SE_Less 01-09_PDF_.33 33 8/6/07 8:45:13 AM Numbers and Operations LESSON How to Solve Problems 8 When you solve problems, remember these words: add to find the total number when you join groups of different sizes multiply to find the total when given equal groups subtract to compare or find a difference There are 274 third graders and 329 fourth graders at Tanglewood School. How many third and fourth graders are there at Tanglewood School? Step 1 Read the problem. Write a sentence telling what you are asked to find. Step 2 Decide if you should add, subtract, or multiply. What operation will you use? Step 3 Use the operation to solve the problem. 274 329 Step 4 Check your work. How can you check your answer? So, there are Tanglewood School. THINK You need to find the total number of third and fourth graders. third and fourth graders at 34 238NA_Mth_G3_SE_Less 01-09_PDF_.34 34 8/6/07 8:45:15 AM Write add, subtract, or multiply to name the operation you will use to solve the problem. Then solve each problem. 1. Rory has 80¢. She spends 43¢ on a granola bar. How much money does Rory have left? 2. Henry scored 2 points in each soccer game. He has played in 7 soccer games. How many points has Henry scored in all of the games? 3. Joe displays his collection of model cars on 3 shelves. There are 8 cars on each shelf. How many model cars does Joe have? 4. Libby’s family drove 283 miles on Friday and 152 miles on Saturday. How many miles did they travel both days? 5. Brecken has a book that is 123 pages long. He has read 64 pages. How many more pages does he need to read to finish the book? 6. Mrs. Rios grew tomato plants in 5 rows of her garden. There were 8 tomato plants in each row. How many tomato plants did Mrs. Rios grow? Numbers and Operations Lesson 8: How to Solve Problems 1. How can you find how much money is left? Subtract or divide? 4. How can you find the total of two groups of different sizes? Add or subtract? 35 238NA_Mth_G3_SE_Less 01-09_PDF_.35 35 8/6/07 8:45:16 AM Numbers and Operations Circle the answer for each question. 1. 2. 3. A roll of mints has 10 pieces. How can you find how many mints there are in 4 packages? A. Subtract 4 from 10. B. Add 10 and 4. C. Multiply 10 by 4. D. Divide 10 by 4. Which operation would best solve this problem? There are 63 houses on Patrick’s paper route. He has delivered the paper to 19 houses so far. How many more houses does he need to deliver the paper to? 4. 5. Pedro had 142 toy cars. He then bought 29 toy cars at a garage sale. Which operation can you use to find how many toy cars Pedro now has? A. addition B. subtraction C. multiplication D. division Rini walked 18 minutes to her friend’s house. They then walked 25 minutes to the park. Which number sentence could you use to find out how many total minutes Rini walked? A. addition B. subtraction A. 25 18 C. multiplication B. 18 25 D. division C. 25 18 D. 18 25 Rosa has saved $37 to buy an MP3 player for $93. How much more money does she need to save? A. $130 C. $64 B. $120 D. $56 36 238NA_Mth_G3_SE_Less 01-09_PDF_.36 36 8/6/07 8:45:18 AM 7. Connor bought 5 packs of pencils. Each pack has 10 pencils. How many pencils did Connor buy? Part A. Write and solve a number sentence to solve the problem. Part B. Explain how you knew what operation to use to solve this problem. -ATH 7ORDS Numbers and Operations Lesson 8: How to Solve Problems Draw a line to match. 8. to find the total when given equal groups add 9. to find a difference subtract 10. to find the total of groups of different sizes multiply 37 238NA_Mth_G3_SE_Less 01-09_PDF_.37 37 8/6/07 8:45:18 AM Numbers and Operations Solving Problems by Adding LESSON 9 When you add whole numbers, remember these words: addend a number added sum the answer to an addition problem Mrs. Roberts’ class collected 318 cans and Mr. Torres’ class collected 456 cans for the can drive. How many cans did both classes collect? Step 1 Step 2 Circle which operation to use. I will (add / subtract) to solve the problem. THINK You need to find the total number of cans. Set up the problem. REMEMBER Line up the numbers by place value. Step 3 Step 4 Add the ones. 1 318 4 5 6 4 THINK 8 6 14. Regroup 14 as 1 ten 4 ones. Add the tens. Then add the hundreds. 1 3 1 8 4 5 6 4 So, the two classes collected cans. 38 238NA_Mth_G3_SE_Less 01-09_PDF_.38 38 8/6/07 8:45:19 AM Find the sum. 1. 43 89 2. 3. 675 132 4. 509 321 5. 224 397 6. 386 427 8. 407 392 7. 57 68 9. 316 485 132 10. 912 219 347 27 32 1. Numbers and Operations Lesson 9: Solving Problems by Adding How can you regroup 12? 1 ten 2 ones or 2 ones 1 ten? 7. Do you need to regroup the sum of 7 8? Yes or no? Solve. 11. 12. Carrie drove 185 miles on Friday and 237 miles on Saturday. How many miles did she drive both days? 11. Do you add or subtract to join two numbers? Miguel read 45 pages of a book before school and 72 pages of the same book after school. How many pages of the book did Miguel read in all? 39 238NA_Mth_G3_SE_Less 01-09_PDF_.39 39 8/6/07 8:45:20 AM Numbers and Operations Circle the answer for each question. 1. 2. 3. 53 29 4. 436 217 A. 24 A. 553 B. 72 B. 643 C. 76 C. 653 D. 82 D. 743 39 47 5. 154 628 A. 66 A. 772 B. 76 B. 782 C. 86 C. 882 D. 96 D. 1,268 Collin bought a new video game for $56 and a used video game for $17. How much did Collin spend for both video games? 6. There were 312 visitors to the zoo Friday morning and 493 visitors to the zoo Friday afternoon. How many visitors came to the zoo on Friday? A. $73 A. 815 visitors B. $72 B. 805 visitors C. $63 C. 605 visitors D. $39 D. 181 visitors 40 238NA_Mth_G3_SE_Less 01-09_PDF_.40 40 8/6/07 8:45:22 AM 7. On a farm, there are 127 horses and 245 cows. Part A. Show how to find how many horses and cows there are in all on the farm. Part B. Explain the steps you used to find the answer to Part A. Math Words 8. Numbers and Operations Lesson 9: Solving Problems by Adding Label the diagram using words from the box. 67 24 91 sum HINT You need to use addend a word more than once! 41 238NA_Mth_G3_SE_Less 01-09_PDF_.41 41 8/6/07 8:45:23 AM Numbers and Operations Solving Problems 10 by Subtracting LESSON When you subtract whole numbers, remember this word: difference the answer to a subtraction problem Carrie is thinking of a number. It is 216 less than 423. Find Carrie’s number. Step 1 Circle which operation to use. I will (add / subtract) to solve the problem. Step 2 Set up the problem. REMEMBER Line up the numbers by place value. Step 3 Subtract the ones. THINK 6 3, so 1 13 423 216 7 Step 4 regroup 2 tens 3 ones as 1 ten 13 ones to subtract. Subtract the tens. Then subtract the hundreds. 1 13 4 2 3 2 1 6 7 So, Carrie’s number is . 42 238NA_Mth_G3_SE_Less 10-19_PDF_.42 42 8/6/07 8:40:48 AM Find the difference. 1. 74 56 2. 3. 863 548 4. 218 85 5. 434 297 6. 307 215 7. 95 46 8. 50 29 9. 317 184 10. 832 173 31 17 1. Numbers and Operations Lesson 10: Solving Problems by Subtracting How can you regroup 74? 7 tens 14 ones or 6 tens 14 ones? 9. What place do you regroup to subtract the tens? ones, tens, or hundreds? Solve. 11. 12. Trevor wanted to ride his bike for 45 minutes. He has been riding his bike for 18 minutes. How much longer does Trevor have to ride his bike to meet his goal? 11. Will you add or subtract to solve? There are two sea turtles at the aquarium. The male sea turtle weighs 342 pounds. The female sea turtle weighs 194 pounds. How much more does the male sea turtle weigh than the female sea turtle? 43 238NA_Mth_G3_SE_Less 10-19_PDF_.43 43 8/6/07 8:40:50 AM Numbers and Operations Circle the answer for each question. 1. 2. 3. 83 45 4. 526 259 A. 32 A. 267 B. 38 B. 273 C. 42 C. 333 D. 48 D. 367 71 54 5. 902 178 A. 27 A. 876 B. 23 B. 824 C. 17 C. 734 D. 7 D. 724 Melody had 82¢. She spent 39¢. How much money does Melody have left? 6. A. 57¢ B. 53¢ C. 47¢ There were 716 people at the school play on Friday night. On Saturday, there were 805 people at the school play. How many more people were at the school play on Saturday than on Friday? D. 43¢ A. 89 people B. 99 people C. 101 people D. 189 people 44 238NA_Mth_G3_SE_Less 10-19_PDF_.44 44 8/6/07 8:40:53 AM 7. Rosewood School had a two week read-a-thon. During the first week, Maria read 56 pages. During the second week she read 81 pages. How many more pages did Maria read during the second week than during the first week? 8. Jin has two puzzles. A sailboat puzzle has 425 pieces. A balloon puzzle has 380 pieces. How many more pieces does the sailboat puzzle have than the balloon puzzle? Math Words Numbers and Operations Lesson 10: Solving Problems by Subtracting Fill in the blanks. 9. The result of an addition problem is the 10. 3 tens 4 ones can be 11. The result of a subtraction problem is the 12. In 14 16 30, 14, and 16 are . as 2 tens 14 ones. . . 45 238NA_Mth_G3_SE_Less 10-19_PDF_.45 45 8/6/07 8:40:53 AM Numbers and Operations Solving Problems with Multiplication LESSON 11 Carefully read word problems to find the question you need to answer and the information in the problem. There is a type of bamboo that grows 12 inches in one day! How many inches will the bamboo grow in one week? Step 1 Write a multiplication sentence. THINK There are 7 days in one week. number of inches 12 Step 2 number of days total number of inches Solve. 12 7 So, the bamboo plant will grow inches in one week. 46 238NA_Mth_G3_SE_Less 10-19_PDF_.46 46 8/6/07 8:40:54 AM Write a multiplication sentence to solve each problem. 1. Jacey’s team scored 3 points in each of the last 7 hockey games he has played. How many points did Jacey’s team score in all? 2. Jenn is peeling carrots for a salad. She peels 2 carrots each minute. How many carrots does she peel in 4 minutes? 3. Farrah’s mom bought 9 packs of juice boxes at the store. Each pack has 3 juice boxes in it. How many juice boxes did Farrah’s mom buy? 4. The state tree of Pennsylvania is the hemlock tree. In one park, there are 5 rows of hemlock trees. Each row has 4 trees. How many hemlock trees are in the park? 5. 1. Numbers and Operations Lesson 11: Solving Problems with Multiplication What is 3 7? 11 or 21? 4. What number do you multiply by 5? 4 or 5? In warm water, coral reefs can grow 2 feet each year. How many feet can a coral reef grow in 8 years? 47 238NA_Mth_G3_SE_Less 10-19_PDF_.47 47 8/6/07 8:40:55 AM Numbers and Operations Circle the answer for each question. 1. Debbie buys 3 boxes of granola bars. Each box has 6 granola bars in it. How many granola bars does Debbie buy in all? 4. 3. A. 76 laps A. 9 granola bars B. 42 laps B. 12 granola bars C. 36 laps C. 18 granola bars D. 13 laps D. 24 granola bars 5. 2. Eric runs 7 laps around the track each day. How many laps does Eric run in 6 days? There are 4 boxes of crayons. Each box has 10 crayons. How many crayons are there in all? A. 6 crayons B. 14 crayons C. 20 crayons D. 40 crayons Mrs. Green baked muffins for the bake sale. She set 8 muffins on each of 3 plates. How many muffins did she bake? 6. Jae used 6 pages of his scrapbook for pictures of a vacation to Hershey, Pennsylvania. He put 4 pictures on each page. How many pictures does Jae have of his vacation? A. 10 pictures B. 14 pictures C. 20 pictures D. 24 pictures A. 24 muffins B. 18 muffins C. 15 muffins Sierra earned $4 an hour for babysitting. She babysat for 4 hours on Saturday. How much money did Sierra earn on Saturday? D. 11 muffins A. $8 C. $16 B. $12 D. $20 48 238NA_Mth_G3_SE_Less 10-19_PDF_.48 48 8/6/07 8:40:56 AM 7. Ahmed has 3 packs of trading cards. Each pack has 8 cards. How many cards does Ahmed have in all? 8. Ben needs 4 tickets for each ride at the fair. Part A. If he goes on 7 different rides, how many tickets does he need? Part B. Explain how you used multiplication to solve the problem. Math Words Numbers and Operations Lesson 11: Solving Problems with Multiplication Fill in the blanks. 9. To find the total when given equal groups I can 10. To compare two groups I can 11. To find the total of different-sized groups I can . . . 49 238NA_Mth_G3_SE_Less 10-19_PDF_.49 49 8/6/07 8:40:57 AM Numbers and Operations Rounding to the 12 Nearest 10 or 100 LESSON When you round numbers, remember this word: round to estimate a number to the nearest 10 or 100 47 rounds to 50 Example 1 Round 176 to the nearest 100. Step 1 0 Place 176 on a number line marked off by 100’s. 100 Step 2 200 300 400 500 600 700 800 900 THINK 176 is between Decide if 176 is closer to 100 or 200. 100 and 200. So, 176 rounded to the nearest 100 is . Example 2 Round 176 to the nearest 10. Step 1 100 Place 176 on a number line marked off by 10’s. 110 Step 2 120 130 140 150 160 Decide if 176 is closer to 170 or 180. So, 176 rounded to the nearest 10 is 170 180 190 200 THINK 176 is between 170 and 180. . 50 238NA_Mth_G3_SE_Less 10-19_PDF_.50 50 8/6/07 8:40:57 AM Round to the nearest 10. 1. 74 2. 93 3. 7 4. 25 5. 38 6. 41 7. 19 8. 55 9. 63 Round to the nearest 10 and 100. 284 11. 149 12. 637 13. 316 14. 851 15. 733 593 17. 475 Which number is 74 closer to on a number line? 70 or 80? 4. 10. 16. 1. Numbers and Operations Lesson 12: Rounding to the Nearest 10 or 100 18. When the ones digit is 5, do you round up or down? 10. 805 Solve. 19. A reindeer can run 32 miles per hour. What is this number rounded to the nearest 10? 20. There are 365 students in the school. What is this number rounded to the nearest 100? Which places change to zero when you round to the nearest hundred? Tens, ones, or both? 19. What number is 32 closer to? 30 or 40? 51 238NA_Mth_G3_SE_Less 10-19_PDF_.51 51 8/6/07 8:40:59 AM Numbers and Operations Circle the answer for each question. 1. 2. 3. Round 48 to the nearest 10. 4. Round 268 to the nearest 100. A. 30 A. 200 B. 40 B. 260 C. 45 C. 270 D. 50 D. 300 Round 314 to the nearest 10. 5. Round 93 to the nearest 100. A. 300 A. 0 B. 310 B. 90 C. 320 C. 100 D. 400 D. 200 Trevor has 137 leaves in his collection. To the nearest 10, how many leaves does Trevor have? 6. Alfredo lives 364 miles away from his grandmother. To the nearest 100, how far does Alfredo live from his grandmother? A. 100 leaves B. 130 leaves A. 300 miles C. 140 leaves B. 360 miles D. 200 leaves C. 370 miles D. 400 miles 52 238NA_Mth_G3_SE_Less 10-19_PDF_.52 52 8/6/07 8:41:01 AM 7. Adam and Jenn went hiking in the Pocono Mountains. Their hiking trip was 26 miles long. To the nearest 10, how many miles did Adam and Jenn hike? 8. Write a 3-digit number that, when rounded to the nearest hundred, rounds to 400. Explain how you know your answer is correct. Math Words Numbers and Operations Lesson 12: Rounding to the Nearest 10 or 100 Fill in the blanks. 9. 375 10. 894 rounded to the nearest is 890. to the nearest 10 is 380 and rounded to the nearest is 400. is 900 and rounded to the nearest 53 238NA_Mth_G3_SE_Less 10-19_PDF_.53 53 8/6/07 8:41:02 AM Numbers and Operations Using Estimation 13 to Solve Problems LESSON When you estimate answers, remember this word: estimate a number that is close to the exact number The table shows the number of apples picked by three friends. Friend Number of Apples Gina Andy James 36 47 31 About how many apples did the friends pick? Step 1 THINK About usually means you can find an estimate. Decide if you need an estimate or exact answer. The question asks “About how many,” so you can use an estimate. Step 2 Round the number of apples each friend picked to the nearest 10. 36 rounds to 40. 47 rounds to 50. 31 rounds to Step 3 . Use mental math to add the rounded numbers. 40 50 So, the friends picked about apples. 54 238NA_Mth_G3_SE_Less 10-19_PDF_.54 54 8/6/07 8:41:02 AM Estimate the sum or difference. 1. 64 28 2. 29 62 3. 147 389 4. 425 150 5. 505 271 6. What does 64 round to? 50 or 60? 853 209 The table shows the driving distances the Chang family traveled when visiting family in Pennsylvania. Use the table for Questions 7–10. 7. 1. Numbers and Operations Lesson 13: Using Estimation to Solve Problems Day Distance Driven Tuesday Wednesday Thursday 187 miles 203 miles 251 miles About how many miles did the Chang family drive on Tuesday and Wednesday? 8. About how many more miles did the Chang family drive on Thursday than on Tuesday? 9. About how many more miles did the Chang family drive on Thursday than on Wednesday? 10. About how many miles did the Chang family travel in all? 4. What place will you round to? Hundreds or tens? 7. Will you estimate a sum or difference to solve? 55 238NA_Mth_G3_SE_Less 10-19_PDF_.55 55 8/6/07 8:41:03 AM Numbers and Operations Circle the answer for each question. 1. 2. There are 87 students signed up for soccer. There are 63 students signed up for swimming. About how many more students are signed up for soccer than swimming? A. 150 students B. 140 students C. 40 students D. 30 students Grover School put on a concert. On Friday night, 212 people came. On Saturday night, 295 people came. Round each number to the nearest hundred to find about how many people came to the concert in all. A. 400 people B. 500 people C. 600 people D. 700 people Use the table to answer Questions 3 and 4. 3. 4. Grade Number of Students Second Third Fourth 212 165 143 To the nearest hundred, about how many students are in all three grades? A. 300 students B. 400 students C. 500 students D. 600 students Which number sentence could you use to estimate the number of students in second grade and third grade? A. 200 100 B. 200 100 C. 200 200 D. 200 200 56 238NA_Mth_G3_SE_Less 10-19_PDF_.56 56 8/6/07 8:41:05 AM 5. Joshua has 132 stickers in his collection. 45 of the stickers are puffy stickers. The rest are regular stickers. About how many regular stickers does Joshua have in his collection? 6. Derek wants to buy a book for $18 and a board game for $31. Derek estimates he needs $40. Is his estimate correct? Explain why or why not. If his estimate is not correct, find the correct estimate. Math Words Numbers and Operations Lesson 13: Using Estimation to Solve Problems Write the meaning for each in your own words. 7. round 8. estimate 57 238NA_Mth_G3_SE_Less 10-19_PDF_.57 57 8/6/07 8:41:06 AM LESSON Measurement 14 Units of Measurement When finding units of measure, first decide if you need to find units of length, weight, mass, or capacity. Then select the size of the unit. Which unit would be best to measure the capacity of a mug? grams cups meters ounces REMEMBER Capacity is a measure of how much something can hold. Step 1 Look at the chart. Find the column for capacity. customary units metric units measurement tools Step 2 length weight and mass inch, foot, yard, mile ounce, pound, ton centimeter, gram, kilogram meter, kilometer ruler, yardstick, scale, pan balance measuring tape Find a unit that measures capacity. So, the best unit to measure the capacity of a mug is . capacity teaspoon, tablespoon, cup, pint, quart, gallon liter, milliliter teaspoon, tablespoon, measuring cup THINK Which answer choice is in the capacity column of the table? 58 238NA_Mth_G3_SE_Less 10-19_PDF_.58 58 8/6/07 8:41:06 AM Lesson 14: Units of Measurement Circle the best unit of measurement for each. 1. 2. capacity of a sink grams feet centimeters gallons length of a piece of paper 4. 1. Which unit is in the mass column of the chart? Grams or centimeters? Measurement 3. mass of an apple distance from your house to school centimeters kilograms teaspoons miles Circle the best measuring tool for each. 5. 7. length of your math book 6. capacity of a juice glass ruler teaspoon yardstick measuring cup weight of a child 8. length of the chalkboard scale yardstick measuring tape ruler 5. Which is best for measuring short objects? Ruler or yardstick? 6. Which makes more sense? Using a teaspoon many times or using a measuring cup one time? 59 238NA_Mth_G3_SE_Less 10-19_PDF_.59 59 8/6/07 8:41:07 AM Circle the answer for each question. Measurement 1. 2. 3. What does a liter measure? 4. What does a gram measure? A. length A. length B. weight B. time C. capacity C. capacity D. time D. mass Which unit can be used to find the length of a feather? 5. Which unit can be used to measure the capacity of a bathtub? A. centimeter B. gram A. ounces C. cup B. gallons D. pound C. tons D. hours Shawn needs to measure the mass of a puppy. Which of the following measurement tools should he use? A. teaspoon B. scale C. measuring tape D. yardstick 6. Margot is making curtains for a large window. She needs to measure 8 feet of fabric. Which measurement tool should Margot use? A. scale B. ruler C. measuring cup D. yardstick 60 238NA_Mth_G3_SE_Less 10-19_PDF_.60 60 8/6/07 8:41:10 AM Lesson 14: Units of Measurement 7. Shelley needs to measure flour for a recipe. What measurement tool should Shelly use? Explain your choice. Part B. Will Shelley measure the flour in ounces, grams, or cups? Explain your choice. Math Words Measurement Part A. Fill in the blanks. 8. Teaspoon, liter, and quart are units used to measure 9. Gram and kilogram are units used to measure 10. Inch, centimeter, yard, and meter are units used to measure 11. A ruler is a tool used to measure 12. A ton is a unit used to measure . . . . . 61 238NA_Mth_G3_SE_Less 10-19_PDF_.61 61 8/6/07 8:41:10 AM LESSON 15 Estimating Length Measurement When you estimate length, remember these units: customary units of length unit benchmark inch the length of a small paper clip foot the length of this page from top to bottom yard the length of a baseball bat mile about how far a person can walk in 20 minutes metric units of length unit benchmark millimeter the width of a pencil point centimeter the width of your thumb meter a little more than 1 yard kilometer about how far a person can walk in 12 minutes Which measurement best describes the height of your desk? 3 inches Step 1 3 feet 3 yards 3 miles Think about 3 inches. 3 inches is (too short / about right / too long). THINK It would take Step 2 Think about 3 feet. 3 feet is (too short / about right / too long). Step 3 Think about 3 yards and 3 miles. 3 yards and 3 miles are (too short / about right / too long). you about 60 minutes to walk 3 miles. So, the best estimate for the height of your desk is about 3 . 62 238NA_Mth_G3_SE_Less 10-19_PDF_.62 62 8/6/07 8:41:11 AM Lesson 15: Estimating Length Circle the better estimate. 1. 5. 7. 2. length of a pencil 3 inches 15 centimeters 3 feet 15 meters distance from Pittsburgh to Philadelphia 4. height of the classroom 300 yards 4 meters 300 miles 4 kilometers length of a football field 6. 30 millimeters 100 yards 30 centimeters 8. About how long is a paper clip? 1 inch or 1 foot? 4. Which unit is about the length of a baseball bat? Meter or kilometer? length of a pin 100 inches height of a third grader 1. Measurement 3. length of a classroom window length of a hiking trail 4 feet 3 meters 4 yards 3 kilometers 8. Which unit shows a distance you would walk? Meter or kilometer? 63 238NA_Mth_G3_SE_Less 10-19_PDF_.63 63 8/6/07 8:41:12 AM Circle the answer for each question. Measurement 1. Which measurement best describes the height of the classroom door? 4. 65 inches 2 kilometers B. 65 feet B. 2 meters C. 65 yards C. 2 centimeters D. 65 miles D. 2 millimeters About how long is a chalkboard eraser? Which is the best estimate for the height of a store ceiling? A. 10 millimeters A. 5 inches B. 10 centimeters B. 5 feet C. 10 meters C. 5 yards D. 10 kilometers D. 5 miles 6. 3. A. A. 5. 2. Which is a reasonable height for an adult? Which is the best estimate for the distance from Harrisburg, Pennsylvania, to Washington, D.C.? A. 120 inches B. 120 feet C. 120 yards D. 120 miles Which of the following is a reasonable distance for a running race? A. 5 millimeters B. 5 centimeters C. 5 meters D. 5 kilometers 64 238NA_Mth_G3_SE_Less 10-19_PDF_.64 64 8/6/07 8:41:14 AM Lesson 15: Estimating Length 7. Which metric unit would you use to measure the length of a classroom? 8. Look at the door to your classroom. Part A. What is a reasonable estimate for the height of the door? Measurement 7 inches, 7 feet, 7 yards, or 7 miles? Part B. -ATH 7ORDS Explain how you made your estimate. Match the benchmark to the unit of measure. 9. the length of a paper clip a yard 10. the length of a baseball bat a mile 11. the length of this page a foot 12. the distance traveled on a 20-minute walk an inch 65 238NA_Mth_G3_SE_Less 10-19_PDF_.65 65 8/6/07 8:41:15 AM LESSON 16 Estimating Weight Measurement When you estimate weight, remember this word: weight how heavy something is Mary weighs the items in the list using ounces or pounds. Find the item she should measure in ounces. Step 1 Step 2 Think about objects that weigh about 1 pound and about 1 ounce. ounce pound a strawberry a bunch of grapes Mary’s List desk math book marker globe Compare each item in Mary’s list to the table in Step 1. Write each item in the table under the best unit of measure. ounces pounds desk REMEMBER Heavier objects are measured in pounds. Lighter objects are measured in ounces. So, the should be measured in ounces. 66 238NA_Mth_G3_SE_Less 10-19_PDF_.66 66 8/6/07 8:41:15 AM Lesson 16: Estimating Weight Write the best unit to weigh each item. Write ounces or pounds. 1. a handful of blueberries 2. a bicycle 1. a watermelon 4. a piece of chalk 5. a computer 6. a bag of potatoes 5. Measurement 3. Which describes a handful of blueberries? Heavy or light? Is a computer heavy or light? 7. a glue stick 9. a cat 8. 10. a pack of gum a toothbrush Solve. 11. 12. The weight of a cell phone is 14 units. Were ounces or pounds used to measure the weight? 11. Is a cell phone heavy or light? The weight of a book is 2 units. Were ounces or pounds used to measure the weight? 67 238NA_Mth_G3_SE_Less 10-19_PDF_.67 67 8/6/07 8:41:17 AM Circle the answer for each question. Measurement 1. 2. 3. Which classroom object would best be measured in ounces? 4. Which object would be best to measure in pounds? A. the garbage pail A. a leaf B. a desk B. an insect C. a chair C. a rock D. chalkboard eraser D. a piece of bark The weight of a bag of oranges is 8 units. Which unit was used to measure the weight? 5. Which unit should you use to measure the weight of a hair brush? A. pounds A. inches B. ounces B. pounds C. feet C. cups D. inches D. ounces Which object should you measure in pounds? 6. The weight of a pair of sunglasses is 5 units. Which unit was used to measure the weight? A. a bracelet B. a backpack A. pounds C. a sandwich B. ounces D. a pencil C. feet D. inches 68 238NA_Mth_G3_SE_Less 10-19_PDF_.68 68 8/6/07 8:41:19 AM Lesson 16: Estimating Weight 7. Look at this list of camping supplies. pocket flashlight canoe hiking boots map tent Sort these supplies into two groups: supplies that you would measure in ounces and supplies you would measure in pounds. ounces Part B. Math Words pounds Explain how you decided which supplies would be best measured using ounces. Fill in the blanks. 8. 9. Measurement Part A. is the measure of how heavy something is. Heavier items are measured in units called measured in units called . . Lighter items are 69 238NA_Mth_G3_SE_Less 10-19_PDF_.69 69 8/6/07 8:41:19 AM LESSON 17 Estimating Capacity Measurement When you estimate capacity, remember this vocabulary word: capacity how much a container can hold Find the unit of measure that would be best for measuring the capacity a fish tank. Step 1 Name the units of capacity. cup Step 2 pint quart gallon Compare each unit of capacity to the fish tank. Cross out units that are too small or too big. THINK A fish Circle the best unit. tank holds a lot of water. You should choose a large unit of capacity. cup pint quart gallon So, the best unit for measuring the capacity of the fish tank is . 70 238NA_Mth_G3_SE_Less 10-19_PDF_.70 70 8/6/07 8:41:20 AM Lesson 17: Estimating Capacity Circle the better estimate. 1. 2. 1. Which unit holds more? Pint or gallon? 3. Measurement 5 pints 5 gallons 30 pints 30 gallons 4. 2 cups 2 quarts 3 cups 3 quarts Write the best unit to measure the capacity of each item. Write cup, pint, quart, or gallon. 5. 5. a soup bowl 6. a bathtub 7. a saucepan 8. a drinking glass Does a soup bowl hold about a pint or about a gallon? 9. Solve. 9. The capacity of a bathroom sink is 5 units. Were pints or gallons used to measure the capacity? 10. The capacity of a punch bowl is 4 units. Were cups or quarts used to measure the capacity? Does a bathroom sink hold a small amount of water or a large amount of water? 71 238NA_Mth_G3_SE_Less 10-19_PDF_.71 71 8/6/07 8:41:23 AM Circle the answer for each question. What is the best unit to measure the capacity of a kitchen sink? 4. The capacity of a fish bowl is 1 unit. What unit was used to measure its capacity? Measurement 1. 2. 3. A. cup B. quart C. gallon D. pint 5. What is the best estimate of the capacity of the pitcher? A. 1 gallon B. 1 quart C. 1 pint D. 1 cup Which object would be best to measure using cups? 6. A. cup C. quart B. pint D. gallon What is the best estimate of the capacity of a coffee mug? A. 1 gallon B. 1 quart C. 1 pint D. 1 cup Kendra is filling her car’s gas tank with gasoline. She fills the tank with 12 units of gasoline. What unit was used to measure the capacity of the gas tank? A. cereal bowl B. punch bowl A. gallons C. bathtub B. cups D. eye dropper C. quarts D. pints 72 238NA_Mth_G3_SE_Less 10-19_PDF_.72 72 8/6/07 8:41:26 AM Lesson 17: Estimating Capacity 7. Dylan has cards with the measurements shown below. 9 gallons 9 quarts 5 cups 9 cups 9 pints Show the cards in order from least capacity to greatest capacity. Part B. Explain how you know your answer is correct. Measurement Part A. -ATH 7ORDS Draw a line to match. 8. the measure of how heavy something is length 9. the measure of how much something holds capacity 10. the measure of the distance of an object from end to end weight 73 238NA_Mth_G3_SE_Less 10-19_PDF_.73 73 8/6/07 8:41:27 AM LESSON 18 Using Rulers Measurement When you measure length, remember these words: length the distance of an object from end to end ruler a tool used to measure length Find the length of the pen to the nearest _21-inch. Inches 1 2 3 4 5 6 Step 1 Line up the beginning of the ruler with the left side of the pen. Step 2 Look at the right end of the pen. REMEMBER The end of the pen is between and Step 3 The numbers on the ruler show inches. . Look at the marks between 5 and 6. 1 Is the end of the pen closest to 5, 5 _2 , or 6? So, the pen is inches long. THINK The mark halfway between two whole numbers shows _21 . 5 1 5 __ 2 6 74 238NA_Mth_G3_SE_Less 10-19_PDF_.74 74 8/6/07 8:41:28 AM Lesson 18: Using Rulers Measure to the nearest _21-inch. 1. 1. 1 2 3 1 2 3 Measurement Inches What whole number is the right end closest to? 2 or 3? 2. Inches For Questions 3-5, use your ruler to measure the objects to the nearest _21-inch. 3. 4. 4. 5. What whole numbers are the right end closest to? 4 and 5 or 5 and 6? 75 238NA_Mth_G3_SE_Less 10-19_PDF_.75 75 8/6/07 8:41:29 AM Circle the answer for each question. Measurement 1. To the nearest _21-inch, what is the length of this barrette? 1 Inches 2. A. 1 inch B. 1 1 _2 inch C. 2 inches D. 1 2 _2 inches 3. Use your ruler to measure the length of the ribbon to the nearest half inch. 2 Use your ruler to measure the length of the ant to the nearest half inch. 4. A. 2 inches B. 2 _2 inches C. 3 inches D. 3 _2 inches 1 1 Use your ruler to measure the length of the ticket to the nearest half inch. MOVIE TICKET A. 2 inches B. 1 _2 inches C. 1 inch D. _1 inch 2 1 A. 2 inches B. 2 _2 inches C. 3 inches D. 3 _2 inches 1 1 76 238NA_Mth_G3_SE_Less 10-19_PDF_.76 76 8/6/07 8:41:34 AM Lesson 18: Using Rulers What is the length of this marker to the nearest half inch? 6. What is the length of this glue stick to the nearest half inch? Measurement 5. Glue Stick Math Words Circle the word that completes the sentence. 7. A (thermometer / ruler) is a tool used to measure length. 8. An (inch / pound) is a unit to measure length. 9. (Length / Capacity) is a distance from the beginning to the end of an object. 77 238NA_Mth_G3_SE_Less 10-19_PDF_.77 77 8/6/07 8:41:35 AM Comparing and Ordering 19 Objects Measurement LESSON When you compare and order objects using measurements, first make sure all of the units are the same. Omar weighs these four boxes. Box A Box B Box C Box D 4 pounds 1 pounds 2 __ 3 pounds 1 pounds 3 __ 2 2 He wants to place them in order from heaviest to lightest. Find how Omar can order the boxes. THINK Since all of the units are the same, pounds, you can compare the numbers. Step 1 Compare the weights to order the boxes. Step 2 Find the heaviest box first. Box A has the greatest weight. It weighs 4 pounds. Step 3 Find the box that comes next. 1 Box comes next. It weighs 3 _2 pounds. Step 4 Find the box that comes next. Box C comes next. It weighs Step 5 THINK The box pounds. with the least weight is the lightest box. Find the lightest box. 1 Box has the least weight. It weighs 2 _2 pounds. So, the boxes in order from heaviest to lightest are Box , Box , Box , and Box . 78 238NA_Mth_G3_SE_Less 10-19_PDF_.78 78 8/6/07 8:41:36 AM Lesson 19: Comparing and Ordering Objects Use , , or to compare the objects. 1. Jeff planted a tree that is 6 feet tall and Mary planted a tree that is 3 feet tall. 6 feet Carson’s cat weighs 12 pounds and his puppy weighs 14 pounds. 12 pounds 3. 6. 5 ounces Graham has a string that is 15 inches long and a string that is 12 inches long. 15 inches 5. 14 pounds Naomi bought an apple that weighs 5 ounces and a plum that weighs 5 ounces. 5 ounces 4. Which symbol means greater than? or ? Measurement 2. 3 feet 1. 12 inches The school nurse measures the heights of four students. Justin is 52 inches tall, Sophia is 48 inches tall, Taylor is 47 inches tall, and Catherine is 53 inches tall. What is the order of the students from tallest to shortest? 5. Who is taller, Justin or Catherine? Kyan has three bags of marbles. The blue bag weighs 17 ounces, the red bag weighs 15 ounces, and the green bag weighs 19 ounces. What is the order of the bags from heaviest to lightest? 79 238NA_Mth_G3_SE_Less 10-19_PDF_.79 79 8/6/07 8:41:37 AM Circle the answer for each question. Measurement 1. 2. Liam cuts two pieces of string for his kite. String A is 34 inches long. String B is 37 inches long. Which of the following best compares the two pieces of string? 3. A bag of oranges weighs 6 _21 pounds and a bag of apples weighs 5 _21 pounds. Which of the following best compares the weights of the bags of fruit? A. apples oranges A. String A String B B. B. String A String B apples oranges C. C. String B String A oranges apples D. D. String B String A oranges apples Carmen measures the length of three worms. A 3 inches B 5 inches C 4 inches Which of these shows the worms in order from longest to shortest? A. B, C, A B. A, B, C C. A, C, B D. B, A, C 4. Carol has four ribbons. The blue ribbon is 5 inches long, the red ribbon is 3 _21 inches long, the green ribbon is 4 _21 inches long, and the yellow ribbon is 4 inches long. Which shows the ribbons in order from shortest to longest? A. red, green, yellow, blue B. red, yellow, green, blue C. blue, green, yellow, red D. yellow, red, green, blue 80 238NA_Mth_G3_SE_Less 10-19_PDF_.80 80 8/6/07 8:41:39 AM Lesson 19: Comparing and Ordering Objects 5. The vet weighs 4 dogs. Rover 47 pounds Cricket Buster Bailey 42 pounds 36 pounds 39 pounds Put the dogs in order of their weights from greatest to least. Part B. Use what you know about comparing weights to explain why your answer is correct. Math Words Measurement Part A. Fill in the missing symbols. 6. The symbol means is less than. 7. The symbol means is greater than. 8. The symbol means is equal to. 81 238NA_Mth_G3_SE_Less 10-19_PDF_.81 81 8/6/07 8:41:40 AM LESSON 20 Telling Time Measurement Remember when telling time that the hour hand is shorter than the minute hand. What time does the clock show? 11 12 1 2 10 9 3 8 4 7 6 5 Read the hour. Step 1 The hour hand is between 10 and 11. So, the hour is Step 2 Read the minutes. Count by 5s. Then count by 1s. 5 11 : 12 10 1 2 10 9 REMEMBER In 5 15 minutes, the minute hand moves from one number to the next. In 1 minute, the minute hand moves from one mark to the next. 3 8 4 7 6 5 So, the time is : . REMEMBER You can say this time as twentytwo minutes after ten. 82 238NA_Mth_G3_SE_Less 20-30_PDF_.82 82 8/6/07 8:38:00 AM Lesson 20: Telling Time Read and write each time. 1. 11 12 2. 1 2 10 9 11 12 8 4. 1 9 12 2 3 8 4 7 5 How many minutes after 6 is it? 7, 12, or 17? 1 9 4 6 11 6 5 10 3 8 4 7 2 7 3 5 10 2 Measurement 3. 6 1. 1 9 4 7 12 10 3 8 11 6 5 Write the time on the clock. 5. 7. quarter after 12 eighteen minutes after 9 6. 8. thirty-two minutes after 4 5. How long is one quarter of an hour? 15 minutes or 30 minutes? half past 3 83 238NA_Mth_G3_SE_Less 20-30_PDF_.83 83 8/6/07 8:38:04 AM Circle the answer for each question. Measurement 1. What is another way of writing “fifty-five minutes after 3?” A. 3:05 B. 3:35 C. 3:55 D. 4:55 4. Which clock shows 8:52? 11 A. 2 9 3 8 4 7 11 12 1 2 B. 9 3 8 4 7 6 5 1 2 10 9 3 8 11 6 C. 5 9:28 B. 9:33 C. 9:53 D. 10:28 2 3 8 4 11 6 12 5 1 2 10 D. 9 3 8 4 7 Julia spent 60 minutes at soccer practice. How many hours long was soccer practice? 1 9 7 A. 12 10 4 7 3. 6 5 10 What time does the clock show? 12 1 10 11 2. 12 5. 6 5 What is another way of writing “quarter past 7”? A. 4 hours A. 6:45 B. 3 hours B. 7:30 C. 2 hours C. 7:45 D. 1 hour D. 7:15 84 238NA_Mth_G3_SE_Less 20-30_PDF_.84 84 8/6/07 8:38:06 AM Lesson 20: Telling Time The clock shows the time that Connie leaves for play practice. 6. 11 12 1 2 10 9 3 8 4 7 6 5 Write the time Connie leaves for play practice. Part B. Connie finishes play practice at 6:15. Draw this time on the clock below. 11 12 1 2 10 9 3 8 4 7 Math Words 11 Measurement Part A. 6 5 Label the clock using words from the box. 12 7. 1 2 10 9 8. hour hand 3 8 4 7 6 5 minute hand quarter hand 85 238NA_Mth_G3_SE_Less 20-30_PDF_.85 85 8/6/07 8:38:07 AM LESSON 21 Elapsed Time Measurement When you find elapsed time, remember this word: elapsed time the amount of time that passes between two events A concert starts at 6:15 P.M. and ends at 8:45 P.M. Find how long the concert lasted. Step 1 Count the hours. THINK Another whole 6:15 to 7:15 1 hour hour would bring the time to 9:15 P.M., which is later than 8:45 P.M. 7:15 to 8:15 1 hour whole hours from 6:15 P.M. to 8:15 P.M. There are Step 2 Count the minutes from 8:15 P.M. to 8:45 P.M. 11 12 1 minutes minutes 9 3 8 minutes There are Step 3 REMEMBER You can skip count by 5s to count the minutes. 2 10 4 7 6 5 5 minutes 10 minutes 15 minutes minutes from 8:15 P.M. to 8:45 P.M. Combine the hours and minutes to find the total elapsed time. So, the concert is hours minutes long. 86 238NA_Mth_G3_SE_Less 20-30_PDF_.86 86 8/6/07 8:38:08 AM Lesson 21: Elapsed Time Find the elapsed time. 1. 2. Start Time: 8:00 A.M. End Time: 11:45 A.M. Elapsed Time: 4. Start Time: 1:45 P.M. End Time: 4:15 P.M. Elapsed Time: Start Time: 7:15 A.M. End Time: 9:30 A.M. Elapsed Time: 7. How many whole hours are there from 4:00 to 6:30? 1, 2, or 3? 2. Find the end time for each. 5. 1. Measurement 3. Start Time: 4:00 P.M. End Time: 6:30 P.M. Elapsed Time: Start Time: 3:30 P.M. 6. Elapsed Time: 2 hours 15 minutes End Time: Start Time: 2:15 P.M. Elapsed Time: 1 hour 45 minutes End Time: Start Time: 8:00 A.M. 8. Elapsed Time: 3 hours 30 minutes End Time: Start Time: 9:45 A.M. Elapsed Time: 1 hour 30 minutes End Time: How many minutes from 3:45 to 4:15? 15, 20, or 30? 5. What time is 2 hours after 3:30? 4:30 or 5:30? Solve. 9. 10. Tanner spends 1 hour 45 minutes jogging each Saturday morning. If he starts at 7:15 A.M., at what time will he finish? Amanda started her homework at 6:45 P.M. She finished at 7:30 P.M. How long did it take Amanda to do her homework? 9. What do you need to find? Elapsed time or end time? 87 238NA_Mth_G3_SE_Less 20-30_PDF_.87 87 8/6/07 8:38:09 AM Circle the answer for each question. Measurement 1. James is going to a bowling party at 4:00 P.M. His watch says that it is 1:15 P.M. How much longer does James have to wait before the bowling party begins? 4. 9:30 A.M. 2 hours 45 minutes B. 9:45 A.M. B. 3 hours 15 minutes C. 10:00 A.M. C. 3 hours 45 minutes D. 10:45 A.M. D. 2 hours 15 minutes Bianca is taking a 2 hour and 30 minute trip to see her sister. She left at 2:30 P.M. At what time should she arrive at her sister’s? Kelly started painting a picture at 1:15 P.M. She stopped at 2:30 P.M. For how long was she painting? A. 15 minutes A. 4:30 P.M. B. 1 hour B. 5:30 P.M. C. 1 hour 15 minutes C. 4:00 P.M. D. 1 hour 30 minutes D. 5:00 P.M. 6. 3. A. A. 5. 2. Anthony and his sister played a game for 30 minutes. If they started at 9:15 A.M., at what time did they finish? Aaron’s band concert was 2 hours 15 minutes long. The concert ended at 9:00 P.M. At what time did the concert start? It takes April 1 hour and 30 minutes to drive to her grandmother’s house. If she leaves at 4:45 P.M., what time will she arrive? A. 6:45 P.M. A. 6:00 P.M. B. 7:00 P.M. B. 6:15 P.M. C. 7:15 P.M. C. 6:45 P.M. D. 7:45 P.M. D. 7:15 P.M. 88 238NA_Mth_G3_SE_Less 20-30_PDF_.88 88 8/6/07 8:38:12 AM Lesson 21: Elapsed Time 7. Rob was at a friend’s house from 1:15 P.M. to 4:30 P.M. Part A. How long was Rob at his friend’s house? Part B. Use what you know about elapsed time to explain why your answer is correct. Measurement Math Words Fill in the blanks. 8. The an activity. time is the amount of time from the start to the end of 9. On a clock face, the hand is the shorter hand. 10. On a clock face, the hand is the longer hand. 89 238NA_Mth_G3_SE_Less 20-30_PDF_.89 89 8/6/07 8:38:12 AM LESSON 22 Two-Dimensional Figures When you work with two-dimensional figures, remember these figures: circle triangle rectangle Geometry pentagon square octagon hexagon Name this figure. Step 1 Count the sides of the figure. There are 6 sides. Step 2 Count the vertices. There are Step 3 THINK Make a mark on each side as you count it. This way you will not forget a side, or count a side two times. vertices. THINK Vertices are the corners of a figure. Compare your answers to the pictures above. So, the figure is a . 90 238NA_Mth_G3_SE_Less 20-30_PDF_.90 90 8/6/07 8:38:13 AM Lesson 22: Two-Dimensional Figures Write the number of sides and vertices for each figure. Then name the figure. 1. 1. 2. sides verticies Which figure has 3 sides? Triangle or square? sides verticies 4. 3. 5. sides verticies How many sides does the figure have? 0, 1, or 2? Geometry sides verticies 4. 6. sides verticies sides verticies 7. Solve. 7. Cody draws a figure with six sides and six verticies. What figure did he draw? What does the figure look like when you draw it? or ? 91 238NA_Mth_G3_SE_Less 20-30_PDF_.91 91 8/6/07 8:38:14 AM Circle the answer for each question. 1. Which of the following figures is a pentagon? 3. A. B. 4. Geometry C. Which figure has 4 corners, 4 square vertices, and opposite sides that are the same length? A. circle B. pentagon C. trapezoid D. rectangle Trent drew three triangles. Which of these is Trent’s drawing? A. D. B. 2. What is the name of this figure? C. A. octagon B. rectangle C. square D. hexagon D. 92 238NA_Mth_G3_SE_Less 20-30_PDF_.92 92 8/6/07 8:38:16 AM Lesson 22: Two-Dimensional Figures 5. Jenna needs to know the different types of two-dimensional figures. Part A. Draw a rectangle. Then draw a figure with fewer sides than a rectangle. Label both figures. Part B. Use what you know about two-dimensional figures to tell why your drawings are correct. Geometry Math Words Label each figure with a word from the box. hexagon circle pentagon octagon rectangle square 6. 93 238NA_Mth_G3_SE_Less 20-30_PDF_.93 93 8/6/07 8:38:16 AM Three-Dimensional 23 Figures LESSON When you work with three-dimensional figures, remember these figures: cube cylinder sphere pyramid cone Geometry rectangular prism What three-dimensional figure does the building look like? THINK The Step 1 Compare the shape of the building to the figures at the top of the page. So, the building is a building has flat faces. There are no curved surfaces. . 94 238NA_Mth_G3_SE_Less 20-30_PDF_.94 94 8/6/07 8:38:17 AM Lesson 23: Three-Dimensional Figures Name the three-dimensional figure. 1. 2. 1. Which figure has triangle faces? A cube or a pyramid? 3. 4. 3. Does the baseball have any flat surfaces? Yes or no? Geometry 5. 6. Solve. 7. 8. Jamie drank a juice box with her lunch. What three-dimensional figure does a juice box look like? Taro ate an ice cream cone with one scoop of ice cream for a treat. What two three-dimensional figures does his treat look like? 7. What does a juice box look like? or ? 95 238NA_Mth_G3_SE_Less 20-30_PDF_.95 95 8/6/07 8:38:19 AM Circle the answer for each question. 1. Which shape is a cylinder? 3. A. B. B. C. Geometry C. D. 2. Julie needed to bring in a cone for her math class. Which of these is a cone? A. D. Oatmeal Which best describes the shape of these objects? 4. Which of the following is a sphere? A. a tissue box A. pyramid B. a party hat B. cone C. a paint can C. cube D. a golf ball D. rectangular prism 96 238NA_Mth_G3_SE_Less 20-30_PDF_.96 96 8/6/07 8:38:22 AM Lesson 23: Three-Dimensional Figures 5. Mrs. Roberts had a list for grocery shopping. Name the three-dimensional figure each item on her list looks like. can of tomato soup orange box of cereal box of tissues party hats Math Words Label each figure with a word from the box. cube sphere pyramid Geometry cone cylinder 6. 97 238NA_Mth_G3_SE_Less 20-30_PDF_.97 97 8/6/07 8:38:23 AM LESSON 24 Symmetry When you find symmetry, remember this word: line of symmetry a line that divides a figure in half line of symmetry Geometry Find how many lines of symmetry the figure has. Step 1 Step 2 H H Imagine folding the figure in half vertically. REMEMBER If the two halves match exactly, the fold is a line of symmetry. Imagine other ways you could fold the figure in half. Draw any other lines of symmetry you find. THINK Try folding the figure horizontally or diagonally. So, the figure has lines of symmetry. 98 238NA_Mth_G3_SE_Less 20-30_PDF_.98 98 8/6/07 8:38:23 AM Lesson 24: Symmetry Tell if the dashed line is a line of symmetry. Write yes or no. 1. 1. Do both sides of the hexagon match? Yes or no? 2. 3. P ➡ Geometry 4. 4. Would both sides match if you folded P in half? Yes or no? Draw the line(s) of symmetry for each figure. 5. 7. 6. 8. X 5. How many lines of symmetry are there? 1 or 2? 99 238NA_Mth_G3_SE_Less 20-30_PDF_.99 99 8/6/07 8:38:24 AM Circle the answer for each question. Geometry 1. 2. Which of these shows a line of symmetry? 3. Which figure has exactly two lines of symmetry? A. A. B. B. C. C. D. D. How many lines of symmetry does the trapezoid have? A. 3 B. 2 C. 1 D. 0 4. Which letter has a line of symmetry? A. I B. N C. S D. Z 100 238NA_Mth_G3_SE_Less 20-30_PDF_.100 100 8/6/07 8:38:27 AM Lesson 24: Symmetry 5. Jill says that a square has more lines of symmetry than a circle. Is she correct? Explain why or why not. 6. Draw all the lines of symmetry the figure has. Match the description to the figures. 7. line of symmetry 8. cube 9. hexagon 10. cone Geometry Math Words 101 238NA_Mth_G3_SE_Less 20-30_PDF_.101 101 8/6/07 8:38:27 AM LESSON 25 Patterns with Numbers When you use patterns, remember this word: pattern a set of numbers or objects that follows a rule Find the next number in the pattern. 2, 5, 8, 11, Step 1 Find how the numbers change in the pattern. 5 is greater than 2. Try addition first. Algebraic Concepts 2 5 THINK 2 plus what number equals 5? Step 2 Check to see if the same rule works with the rest of the pattern. 538 83 Step 3 Use the rule to find the next number in the pattern. 11 So, the next number in the pattern is . 102 238NA_Mth_G3_SE_Less 20-30_PDF_.102 102 8/6/07 8:38:27 AM Lesson 25: Patterns with Numbers Find the next number in each pattern. 1. 22, 19, 16, 13, 2. 20, 25, 30, 35, 3. 2, 6, 10, 14, 4. 34, 29, 24, 19, 5. 10, 30, 50, 70, 6. 8, 16, 24, 32, 7. 64, 57, 50, 43, 8. 41, 47, 53, 59, 1. Will you subtract 3 or add 3? Find the missing number in each pattern. 9. 14, 17, 11. 80, 13. 95, 75, 15. 63, , 23, 26 10. 64, 60, 56, , 48 , 64, 56, 48 12. 3, 10, 17, , 31 , 35, 15 14. 35, 38, 41, , 47 , 53, 48, 43 16. 77, 83, 89, , 101 9. Do the numbers in the pattern get larger or smaller? 17. 18. Aidan saved $9 the first week, $18 the second week, and $27 the third week. If this pattern continues, how much money will Aidan have saved the fourth week? Algebraic Concepts Solve. 17. What number plus 9 equals 18? 2, 6, or 9? Jess made a tower with 10 blocks in the first row, 7 blocks in the second row, and 4 blocks in the third row. If this pattern continues, how many blocks will be in the fourth row? 103 238NA_Mth_G3_SE_Less 20-30_PDF_.103 103 8/6/07 8:38:28 AM Circle the answer for each question. 1. Which number is missing from the pattern? 47, 45, 2. 4. What is the next number in the pattern? , 41, 39 33, 39, 45, 51, A. 44 A. 57 B. 43 B. 55 C. 42 C. 52 D. 38 D. 50 What is the next number in the pattern? 5. Which number is missing from the pattern? Algebraic Concepts 49, 58, 67, 76, 3. 68, , 44, 32, 20 A. 77 A. 80 C. 56 B. 80 B. 60 D. 8 C. 85 D. 94 Colleen wrote this pattern of numbers. 62, 57, 52, 47, 42 What rule did Colleen use? 6. Piper drew a pattern of circles. In the first, row she used 18 circles. In the second row, she used 24 circles. In the third row, she used 30 circles. If she continues to use this pattern, how many circles will there be in the fourth row? A. subtract 7 A. 36 circles B. add 7 B. 31 circles C. add 5 C. 28 circles D. subtract 5 D. 26 circles 104 238NA_Mth_G3_SE_Less 20-30_PDF_.104 104 8/6/07 8:38:30 AM Lesson 25: Patterns with Numbers 7. Write the missing number in the pattern. 43, 47, 8. , 55, 59 Look at the pattern shown below. 58, 52, 46, 40, 34, Part A. Write the next number in the pattern. Part B. Explain how you found the next number in the pattern. Math Words 9. Write the meaning using your own words. pattern Algebraic Concepts 105 238NA_Mth_G3_SE_Less 20-30_PDF_.105 105 8/6/07 8:38:31 AM LESSON 26 Patterns with Shapes Remember, a pattern changes or repeats using a rule. Find the next shape in the pattern. Step 1 Look at each figure and the ones near it. How are the figures alike? How are the figures different? Step 2 Decide how one figure is changed to get to the next figure. Algebraic Concepts THINK The second figure has 1 more square. Step 3 Check to see if the same rule works with the rest of the figures. The rule add 1 square (works / does not work) with the rest of the pattern. Step 4 Use the rule to draw the next figure in the pattern. So, the next figure in the pattern has squares. 106 238NA_Mth_G3_SE_Less 20-30_PDF_.106 106 8/6/07 8:38:31 AM Lesson 26: Patterns with Shapes Draw the next figure in the pattern. 1. 2. 1. How many more parts does the second circle have than the first circle? 1 or 2? 3. 4. Draw the missing figure in the pattern. 5. 6. What shape comes right after the circle? Square or triangle? Algebraic Concepts 5. 7. 8. 107 238NA_Mth_G3_SE_Less 20-30_PDF_.107 107 8/6/07 8:38:32 AM Circle the answer for each question. 1. Which of the following shapes comes next in the pattern? 3. Which of the following shapes comes next in the pattern? A. A. C. B. D. B. C. D. Algebraic Concepts 2. What is the missing figure in the pattern? 4. What is the missing figure in the pattern? A. A. B. B. C. C. D. D. 108 238NA_Mth_G3_SE_Less 20-30_PDF_.108 108 8/6/07 8:38:34 AM Lesson 26: Patterns with Shapes 5. Noel drew this pattern. Part A. Draw the figure that is missing from Noel’s pattern. Part B. Use what you know about patterns to explain why your drawing is correct. Algebraic Concepts Math Words Circle the correct word. 6. Will started with one square and added one square to each figure. Will made a (pattern / product). 7. Add 1 square is the (rule / law) for Will’s pattern. 109 238NA_Mth_G3_SE_Less 20-30_PDF_.109 109 8/6/07 8:38:35 AM Completing Number 27 Sentences LESSON When you use number sentences, remember this word: number sentence a statement written with numbers and symbols 4 8 12 12 is a number sentence Write , , or to make the sentence true. Algebraic Concepts 17 9 74 Step 1 Solve each side of the sentence. 17 9 8 7 4 11 Step 2 Compare the two sides. Choose the symbol. 17 9 74 8 11 So, 17 9 THINK You need to solve each problem to decide which symbol to use. THINK Which symbol means is less than? 7 4. 110 238NA_Mth_G3_SE_Less 20-30_PDF_.110 110 8/6/07 8:38:35 AM Lesson 27: Completing Number Sentences Find the missing number for each. 1. 7 3 3. 5. 7. 9. 2. 8 11 4. 8 6. 12 6 14 5 8 4 20 15 6 4 28 28 8. 10. 12 12. 36 1. What number plus 3 equals 7? 4 or 5? 6. How many groups of 4 are in 28? 6, 7, or 8? 20 Write , , or . 38 13. 11 9 15. 52 17. 29 12 3 15 7 92 14. 42 12 3 13 6 16. 55 46 25 9 18. 23 6 14 5 11. Algebraic Concepts 11. Which symbol means greater than? or ? 111 238NA_Mth_G3_SE_Less 20-30_PDF_.111 111 8/6/07 8:38:36 AM Circle the answer for each question. 1. Which number makes this number sentence true? 10 2. Algebraic Concepts What number makes this number sentence true? 6 13 A. 3 A. 9 B. 4 B. 8 C. 5 C. 7 D. 16 D. 6 Which number makes this number sentence true? 4 3. 4. 5. Which symbol makes this number sentence true? 28 64 A. 9 A. B. 8 B. C. 7 C. D. 6 D. Which symbol makes this number sentence true? 83 6. 22 15 7 Which symbol makes this number sentence true? 64 17 4 A. A. B. B. C. C. D. D. 74 112 238NA_Mth_G3_SE_Less 20-30_PDF_.112 112 8/6/07 8:38:39 AM Lesson 27: Completing Number Sentences 7. Paloma wrote this number sentence: 64 28 Part A. Write , , or to make the number sentence true. Part B. Explain how you decided what symbol completed the number sentence. Math Words Fill in the blanks. 8. The symbol means is to. 9. The symbol means is than. 10. The symbol means is than. Algebraic Concepts 113 238NA_Mth_G3_SE_Less 20-30_PDF_.113 113 8/6/07 8:38:39 AM Solving Problems with 28 Number Sentences LESSON When writing a number sentence, first choose the operation, next find the numbers to use, and then write the number sentence. There are 8 teams in a hockey event. Each team has 15 players. Write a number sentence to find the total number of players in the hockey event. Step 1 Choose an operation. Should you add, subtract, or multiply? Step 2 Find the numbers you need to use. There are 8 teams. Each team has Algebraic Concepts Step 3 THINK You want to find the total for 8 equal groups. What is the easiest way to solve this problem? players. Write a number sentence using the numbers and operation. number of teams operation number of players equals total 8 REMEMBER You can leave the total blank because the question only asks you to write a number sentence. So, the number sentence for the problem is . 114 238NA_Mth_G3_SE_Less 20-30_PDF_.114 114 8/6/07 8:38:40 AM Lesson 28: Solving Problems with Number Sentences Write a number sentence for each problem. 1. Callie bought 4 puzzles for $6 each. Write a number sentence to find the total cost of the puzzles. 2. Chris had $20. He spent $14 on a board game. Write a number sentence to find the amount of money Chris has left. 3. Oscar spent 18 minutes on his math homework and 13 minutes on his spelling homework. Write a number sentence to find the total number of minutes he spent studying. 1. Will you multiply or add? 3. Which operation symbol will you use? or ? Write a sentence using , , or for each problem. 5. During a bowling game, Trinisha scored 123 points and Alberto scored 126 points. Write a sentence comparing their scores. Algebraic Concepts 4. 4. Which symbol means is less than? or ? The mass of one mineral was 145 grams and the mass of another mineral was 145 grams. Write a sentence comparing the masses. 115 238NA_Mth_G3_SE_Less 20-30_PDF_.115 115 8/6/07 8:38:41 AM Circle the answer for each question. 1. Algebraic Concepts 2. 3. Jess is 3 years younger than her brother. Her brother is 11 years old. Which number sentence can be used to find Jess’ age? A. 11 3 B. 11 3 C. 11 3 D. 11 3 Jin wants to give 6 balloons to each of his 4 friends. Which number sentence can he use to find how many total balloons he will give to his friends? A. 64 B. 64 C. 64 D. 64 Krista has 47¢. Her sister Misty has 53¢. Which sentence compares the amounts of money Krista and Misty have? A. 47¢ 53¢ B. 47¢ 53¢ C. 53¢ 47¢ D. 47¢ 53¢ 4. 5. Gavin scored 24 points in his first basketball game and 16 points in his second basketball game. Which number sentence can be used to find the total number of points he scored? A. 24 16 B. 24 16 C. 24 16 D. 24 16 Mrs. Bell bought 9 boxes of crayons. Each box cost $3. Which number sentence can be used to find the total amount Mrs. Bell spent on the crayons? A. 93 B. 93 C. 93 D. 93 116 238NA_Mth_G3_SE_Less 20-30_PDF_.116 116 8/6/07 8:38:44 AM Lesson 28: Solving Problems with Number Sentences 6. At the carnival, rides cost $2 each. Part A. Write a number sentence to show how much it would cost to go on 7 rides. Part B. Use what you know about number sentences to explain why your answer is correct. -ATH 7ORDS Draw a line to match the operation to its symbol. addition 8. subtraction 9. multiplication Algebraic Concepts 7. 117 238NA_Mth_G3_SE_Less 20-30_PDF_.117 117 8/6/07 8:38:44 AM LESSON 29 Bar Graphs When you use a bar graph, remember these words: bar graph a graph that uses bars scale the numbers on a line that tell you the number for each bar Number of Students Find how many students chose science as their favorite class. Favorite Class 10 THINK The bar for 8 science is halfway between two lines. 6 4 2 0 Math Reading Social Studies Science Class Step 1 Find the bar for science. Step 2 With your finger, trace a line from the top of the bar for science to the left side of the graph. Step 3 Read the scale. Statistics and Probability The line for science is halfway between So, and . students picked science as their favorite class. 118 238NA_Mth_G3_SE_Less 20-30_PDF_.118 118 8/6/07 8:38:45 AM Lesson 29: Bar Graphs Use the graph to answer Questions 1-6. Animal Speeds Miles per Hour 60 50 40 30 20 10 0 1. Lion Turkey Elk Zebra Animal Cat Which animal has the fastest speed? 2. Which animal has a speed of 45 miles per hour? 3. What is the speed of a turkey? 1. Which bar shows the fastest speed? Shortest bar or tallest bar? 3. 4. Which animal is faster than a zebra but slower than a lion? 5. What is the difference in speed between an elk and a cat? 6. An elephant can have a speed of 25 miles per hour. Show this on the graph. What number is halfway between 10 and 20? 12, 15, or 18? 6. 119 238NA_Mth_G3_SE_Less 20-30_PDF_.119 119 Statistics and Probability What lines will the bar end between? 10 and 20 or 0 and 30? 8/6/07 8:38:46 AM Circle the answer for each question. Use the graph to answer Questions 1 and 2. Calories Burned Favorite Movies 8 Scary 6 4 2 0 Skiing Jogging Swimming Activity 1. 2. Jumping Rope Type of Movie Calories per Minute 10 Statistics and Probability Use the graph to answer Questions 3 and 4. Cartoon Drama Comedy How many calories do you burn each minute jumping rope? 0 5 10 15 20 Number of Votes 25 A. 7 calories B. 8 calories Which type of movie did the fewest people vote for? C. 9 calories A. comedy D. 10 calories B. drama C. cartoon D. scary 3. Which activity do you burn 8 calories per minute? A. skiing B. jogging How many students voted for comedy or cartoon? C. swimming A. 5 students D. jumping rope B. 50 students C. 55 students D. 75 students 4. 30 120 238NA_Mth_G3_SE_Less 20-30_PDF_.120 120 8/6/07 8:38:48 AM Lesson 29: Bar Graphs Number of Books Read Use the graph to answer Questions 5 and 6. Book-A-Thon 50 40 30 20 10 0 Mr. Rios Miss Morgan Mrs. Clarke Mrs. Trong Classroom Teacher 5. How many books did the students in Mrs. Clarke’s class read? 6. Look at the graph. Part A. Draw a bar to show 20 books were read in Mr. Ely’s class. Part B. Use what you know about bar graphs to explain why your answer is correct. Math Words Fill in the blanks. 7. A shows information using bars. 8. Numbers that help you read a graph are the . 238NA_Mth_G3_SE_Less 20-30_PDF_.121 121 Statistics and Probability 121 8/6/07 8:38:48 AM LESSON 30 Tables When you use tables, remember these words: table a chart that uses tallies and numbers to show information tally a way of counting by making a mark for each item shows 7 How many third graders visited Scranton? Cities Visited in Pennsylvania City Tally Number Statistics and Probability Scranton So, Lebanon 12 Harrisburg 21 Reading 4 Step 1 Find Scranton on the table. The first row shows the number of third graders who visited Scranton. Step 2 Count the tallies. 5, 10, 15, 16, , REMEMBER 5 1 third graders visited Scranton. 122 238NA_Mth_G3_SE_Less 20-30_PDF_.122 122 8/6/07 8:38:49 AM Lesson 30: Tables Use the table to answer Questions 1–5. Plants in Mr. Rowe’s Garden Plant Tally Number Tomato Cucumber Pepper Carrots 1. How many tomato plants are in Mr. Rowe’s garden? 2. Which plant does Mr. Rowe have the fewest of in his garden? 3. How many plants in all are in Mr. Rowe’s garden? 4. How many more carrot plants than pepper plants does Mr. Rowe have? 5. Mr. Rowe decides to plant 17 bean plants. Draw the tally marks you would make to show this on the table. Bean Tally Number How many does each stand for? 1 or 5? 3. How can you find the total number? Add or subtract? 5. How many do you need to show 15? 3, 5, or 15? 17 123 238NA_Mth_G3_SE_Less 20-30_PDF_.123 123 Statistics and Probability Plant 1. 8/6/07 8:38:50 AM Circle the answer for each question. Use the table to answer Questions 1 and 2. Use the table to answer Questions 3 and 4. Favorite Games of Third Graders Favorite Places to Visit Game Number Place Go Fish Mountains Chess Zoo Dominos Museum Checkers Park 1. 2. Statistics and Probability Tally How many third graders chose chess? 3. Tally Which place did 29 students choose? A. 22 third graders A. mountains B. 27 third graders B. zoo C. 52 third graders C. museum D. 62 third graders D. park What is the least popular game? 4. Number How many more students chose the zoo than the museum? A. go fish B. chess A. 7 students C. dominos B. 8 students D. checkers C. 9 students D. 11 students 124 238NA_Mth_G3_SE_Less 20-30_PDF_.124 124 8/6/07 8:38:52 AM Lesson 30: Tables Use the table to answer Questions 5 and 6. Favorite Season Season Tally Number Winter Spring Summer Fall 5. Which season did 22 students choose? 6. 19 students chose fall as their favorite season. Part A. Draw tally marks on the table to show how many students chose fall. Part B. Explain how you knew how many Math Words and to draw. Fill in the blanks. 7. A uses tallies and numbers to show information. 8. A mark for each item counted is called a . 238NA_Mth_G3_SE_Less 20-30_PDF_.125 125 Statistics and Probability 125 8/6/07 8:38:53 AM Math Words to find the total number when you join groups of different sizes add A bottom number of a fraction; it tells the number of equal parts (Lesson 4) D (Lesson 8) addend a graph that uses bars (Lesson 29) capacity C the answer to a subtraction problem (Lesson 10) difference a number added (Lesson 9) bar graph B denominator the E the amount of time that passes between two events (Lesson 21) elapsed time a symbol used to show two numbers have the same value (Lesson 3) is equal to (⫽) how much a container can hold (Lesson 17) to find a number that is close to the exact number (Lesson 13) centimeter a metric unit used to measure length (Lesson 15) estimate a round two-dimensional figure with all points the same distance from the center (Lesson 22) even numbers circle or 8 (Lesson 2) end in 0, 2, 4, 6, expanded form writing numbers by adding the values of the digits a three-dimensional figure whose only face is a circle (Lesson 23) cone (Lesson 1) a rectangular prism with six congruent square faces (Lesson 23) cube a three-dimensional figure with two same-size circular bases and a curved surface that connects the bases (Lesson 23) cylinder F names part of a whole or part of a set (Lesson 4) fraction a set of related addition and subtraction number sentences (Lesson 6) fact family a customary unit used to measure length (Lesson 15) foot 126 238NA_Mth_G3_SE_BM_PDF_.indd 126 8/6/07 8:56:40 AM G is greater than (⬎) a symbol used to compare two numbers when the larger number is fi rst (Lesson 3) M a metric unit used to measure length (Lesson 15) meter a customary unit used to measure length (Lesson 15) mile a metric unit used to measure length (Lesson 15) millimeter H I K L hexagon a two-dimensional figure with 6 sides and 6 corners (Lesson 22) a customary unit used to measure length (Lesson 15) inch to find the total when given equal groups (Lesson 8) multiply statement written with numbers and symbols (Lesson 27) N numerator the distance of an object from end to end (Lesson 18) a symbol used to compare two numbers when the lesser number is first (Lesson 3) is less than (⬍) line of symmetry the top number of a fraction (Lesson 4) a metric unit used to measure length (Lesson 15) kilometer length number sentence a O octagon a two-dimensional figure with 8 sides and 8 corners (Lesson 22) odd numbers or 9 (Lesson 2) end in 1, 3, 5, 7, a line that divides a figure in half (Lesson 24) 127 238NA_Mth_G3_SE_BM_PDF_.indd 127 8/6/07 8:56:42 AM a set of numbers or objects that follows a rule pattern P S the numbers on a line that tell you the number for each scale (Lesson 25) bar (Lesson 29) a two-dimensional figure with 5 sides and 5 corners (Lesson 22) sphere a three-dimensional figure shaped like a round, smooth ball (Lesson 23) pentagon place value the value of a position a rectangle with sides that are the same length (Lesson 22) in a number (Lesson 1) square pyramid a three-dimensional figure with a bottom face with straight sides and the other faces are all triangles standard form writing with digits (Lesson 1) (Lesson 23) subtract numbers to compare or find a difference (Lesson 8) R the answer to an addition problem (Lesson 9) sum rectangle a two-dimensional figure with 4 sides and 4 square corners; its opposite sides are the same length (Lesson 22) rectangular prism a threedimensional figure with 6 faces that are rectangles (Lesson 23) to estimate a number to the nearest 10 or 100 (Lesson 12) round ruler a tool used to measure length (Lesson 18) T a chart that uses tallies and numbers to show information (Lesson 30) table a way of counting by making a mark for each item (Lesson 30) tally triangle a two-dimensional figure with 3 sides and 3 corners (Lesson 22) 128 238NA_Mth_G3_SE_BM_PDF_.indd 128 8/6/07 8:56:44 AM Math Words W weight how heavy something is (Lesson 16) Y a customary unit used to measure length (Lesson 15) yard My Math Words 129 238NA_Mth_G3_SE_BM_PDF_.indd 129 8/6/07 8:56:45 AM 238NA_Mth_G3_SE_BM_PDF_.indd 130 8/6/07 8:56:46 AM 238NA_Mth_G3_SE_BM_PDF_.indd 131 8/6/07 8:56:46 AM 238NA_Mth_G3_SE_BM_PDF_.indd 132 8/6/07 8:56:46 AM 238NA_Mth_G3_SE_BM_PDF_.indd 133 8/6/07 8:56:46 AM 238NA_Mth_G3_SE_BM_PDF_.indd 134 8/6/07 8:56:46 AM 238NA_Mth_G3_SE_BM_PDF_.indd 135 8/6/07 8:56:47 AM 238NA_Mth_G3_SE_BM_PDF_.indd 136 8/6/07 8:56:47 AM 238NA_Mth_G3_SE_BM_PDF_.indd 137 8/6/07 8:56:47 AM 238NA_Mth_G3_SE_BM_PDF_.indd 138 8/6/07 8:56:47 AM 238NA_Mth_G3_SE_BM_PDF_.indd 139 8/6/07 8:56:47 AM 238NA_Mth_G3_SE_BM_PDF_.indd 140 8/6/07 8:56:47 AM 238NA_Mth_G3_SE_BM_PDF_.indd 141 8/6/07 8:56:47 AM 238NA_Mth_G3_SE_BM_PDF_.indd 142 8/6/07 8:56:47 AM 238NA_Mth_G3_SE_BM_PDF_.indd 143 8/6/07 8:56:47 AM 238NA_Mth_G3_SE_BM_PDF_.indd 144 8/6/07 8:56:47 AM