CHAPTE R 2 Subtraction Concepts The Key Vocabulary BIG Idea How do I take away from a group and compare groups? English subtract difference minus (-) Español restar diferencia resta (-) Mei, Ella, and Colin in Copyright © Macmillan/McGraw-Hill, a division of The McGraw-Hill Companies, Inc. Frogs on a Log Look at all the frogs! Ah-CHOO! How many frogs jumped off! fifty-seven 57 Name Write how many. 1. 2. Draw circles to show how many. 6 3. 3 5. 4 X on 2 frogs. Write how many are left. 6. Online Option 58 fifty-eight Take the Online Readiness Quiz. This page checks skills needed for the chapter. Copyright © Macmillan/McGraw-Hill, a division of The McGraw-Hill Companies, Inc. Put an 4. Dear Family, Today my class started the chapter Subtraction Concepts. In this chapter, I will learn to write subtraction number sentences. Here are my vocabulary words, an activity we can do, and a list of books we can look for in our local library. Love, Key Vocabulary Activity Copyright © Macmillan/McGraw-Hill, a division of The McGraw-Hill Companies, Inc. s 12 pennie e k a h s Hold and nds. Then a h d e p p u in your c ve ands abo h r u o y n ope y the ake awa T . le b ta the tails nd on the la t a th s one nnies many pe w o H . tell e sid our child y e v a H are left? stor y. btraction u s e th u yo Books to Read Subtraction Action by Loreen Leedy Holidayy House, Inc. subtract to take away subtraction number sentence 7-3=4 minus sign difference equals sign Online Option See the multilingual eGlossary link at connectED.mcgraw-hill.com to find out more about these words. There are 13 languages. One Less Fish by Kim Michelle Toft Charlesbridge Publishing Ten Sly Piranhas: A Counting Story in Reverse by William Wise Penguin Group USA fifty-nine 59 Estimada familia: Hoy mi clase comenzó el capítulo Conceptos de resta. Aprenderé a mostrar y escribir oraciones numéricas de resta. A continuación están mis palabras del vocabulario, una actividad que podemos hacer y una lista de libros que se encuentran en nuestra biblioteca local. Cariños, Vocabulario clave d Activida s mézclelo , s ie n n e p Tome 12 bre la s caer so lo je é d y ron bien que caye s lo e r ti s mesa. Re tos pennie n á u C ¿ . o en escud su rmita que e P ? n a d que istoria ente la h u c le o niñ ta. de la res restar eliminar o quitar oración numérica de resta 7-3=4 signo de resta diferencia signo de igual Opción en línea Visiten el eGlosario políglota en connectED.mcgraw-hill.com para aprender más acerca de estas palabras. Hay 13 idiomas. Restar de Lisa Trumbauer Red Brick 60 sixty Vaya Appetito Tiene el Zorrito de Claudia Rueda Serres Ediciones Copyright © Macmillan/McGraw-Hill, a division of The McGraw-Hill Companies, Inc. Libros recomendados Multi-Part Lesson Name PART A B 1 C D E F Subtraction Copyright © Macmillan/McGraw-Hill, a division of The McGraw-Hill Companies, Inc. First use this page as a workmat. Then draw pictures to show how you solved the problem. GLE 0106.2.3 Develop strategies for learning basic addition facts and related subtraction facts. Also addresses GLE 0106.1.1. Subtraction Concepts sixty-one 61 G Use . Create subtraction stories. Write a subtraction sentence. 1. 2. part part whole whole part take away is part . 3. take away . 4. part part whole take away sixty-two is Copyright © Macmillan/McGraw-Hill, a division of The McGraw-Hill Companies, Inc. whole part 62 is part . take away is . Subtraction Concepts Multi-Part Lesson Name PART A B 1 C D E F G Subtraction Stories Get Ready I had 6 crayons on the table. I took away 1 crayon. There are 5 crayons left on the table. Main Idea I will use counters to model subtraction stories. Use to show the number story. Count how many are left. Check Tell a number story to your partner. Use . Copyright © Macmillan/McGraw-Hill, a division of The McGraw-Hill Companies, Inc. 1. How many kites are left flying? kites How many birds are left in the birdbath? birds 2. 3. E Talk Math How are addition and subtraction stories different? GLE 0106.2.3 Develop strategies for learning basic addition facts and related subtraction facts. Also addresses GLE 0106.1.1. Subtraction Concepts sixty-three 63 Practice Tell a number story to your partner. Use . 4. How many ants are on the leaf? ants How many butterflies are left? butterflies How many apples are left on the tree? apples 5. 6. to solve. 7. There are 8 bees near the hive. 3 bees fly away. How many bees stayed? bees 64 sixty-four Math at Home Activity: Tell subtraction stories to your child. Have your child use buttons or pennies to model each story. Copyright © Macmillan/McGraw-Hill, a division of The McGraw-Hill Companies, Inc. Use 1 Multi-Part Lesson Name PART A B C D E F G Model Subtraction Get Ready When you know the whole and one part, you can subtract to find the other part. Main Idea I will subtract parts from a whole. Vocabulary subtract Part Part Part Whole Part Part Whole Part Part Part 2 7 2 Whole Whole 9 9 Copyright © Macmillan/McGraw-Hill, a division of The McGraw-Hill Companies, Inc. Check Use WorkMat 3 and 1. Part Part to subtract. 2. Part Part 4 3. 2 Part Part 6 Whole Whole Whole 5 10 9 4. E Talk Math You have 10 counters. 3 of the counters are yellow. Do you have more than 7 red counters? Explain. GLE 0106.2.3 Develop strategies for learning basic addition facts and related subtraction facts. Subtraction Concepts sixty-five 65 Practice Use WorkMat 3 and 5. Part Part to subtract. 6. Part Part 3 7. 3 Whole Whole 8 7 Part Part 8. Part Part 4 9. 1 Whole Whole 9 4 Part Part 10. Part Part 4 Whole Whole 6 5 Part Part 6 12. Part Part 5 Whole Whole 7 7 13. E Write Math If the whole is 10 and one of the parts is 10, what is the other part? Explain. 66 sixty-six Math at Home Activity: Have your child use small objects such as buttons, beans, or pennies to model subtraction. Copyright © Macmillan/McGraw-Hill, a division of The McGraw-Hill Companies, Inc. 11. 3 Multi-Part Lesson Name PART A B 1 C D E F G Subtraction Number Sentences Get Ready Main Idea I will write subtraction number sentences. ces. Vocabulary subtraction number sentence difference minus (-) 5 - 2 = 3 is a subtraction number sentence . 3 is the difference . See Say 5 Write 5 minus - 2 2 equals = 3 3 Check 5 Copyright © Macmillan/McGraw-Hill, a division of The McGraw-Hill Companies, Inc. tence. Write the subtraction number sentence. 1. 8 minus 3 equals 8 2. 4. E 3 5 5 8 3 . 3. Talk Math What does - mean? GLE 0106.1.1 Use mathematical language, symbols, and definitions while developing mathematical reasoning. Also addresses GLE 0106.2.3. Subtraction Concepts sixty-seven 67 Practice 1 Write the subtraction number sentence. ce. 2 1 5. 7. 8. 9. 10. 11. 12. 13. 68 sixty-eight Copyright © Macmillan/McGraw-Hill, a division of The McGraw-Hill Companies, Inc. 6. Name Practice Copyright © Macmillan/McGraw-Hill, a division of The McGraw-Hill Companies, Inc. Write the subtraction number sentence. 14. 15. 16. 17. 18. 19. 20. 21. 22. 23. Subtraction Concepts sixty-nine 69 Solve. 24. Ming has 7 teddy bears. She gives 4 of them away. How many teddy bears does she have left? teddy bears 25. Kayla has 4 rockets. She gives some rockets away. She has 2 rockets left. How many rockets did she give away? rockets cars 27. Critical Thinking Pick two numbers. Subtract. Write the subtraction number sentence on another paper. Repeat. How many subtraction sentences can you write? 70 seventy Math at Home Activity: Using buttons, beans, or pennies, have your child act out subtraction stories. Have him or her write subtraction number sentences for the stories. Copyright © Macmillan/McGraw-Hill, a division of The McGraw-Hill Companies, Inc. 26. There are 5 cars racing. 3 cars stop. How many cars are still racing? Name Extra Practice e Write the subtraction number sentence. 1. 2. 3. 4. Copyright © Macmillan/McGraw-Hill, a division of The McGraw-Hill Companies, Inc. 5. 6. 7. Subtraction Concepts seventy-one 71 Subtracting to Swim Subtraction 7 7 6 7 Use . Subtract the number on the 1 4 from the number on the 5 . 5 1 4 5 5 You Will Need Play with a partner. Take turns. Roll both 56 1 4 . 6 5 Say your answer. Move that many spaces on the game board. The first person to swim around the coral reef wins! START E N D Copyright © Macmillan/McGraw-Hill, a division of The McGraw-Hill Companies, Inc. 72 seventy-two Subtraction Concepts Multi-Part Lesson Name PART A B 1 C D E F G Subtract 0 and All Get Ready When you subtract 0 you have the same number left. Main Idea I will subtract 0 or find a difference of 0. When you subtract all, you have 0 left. 4 0 = 4 4 4 = 0 Check Copyright © Macmillan/McGraw-Hill, a division of The McGraw-Hill Companies, Inc. Write the subtraction number sentence. Find the difference. 1. 2. 8 3. 5. E 8 = 0 4. Talk Math Why do you get zero when you subtract all? GLE 0106.2.3 Develop strategies for learning basic addition facts and related subtraction facts. Also addresses GLE 0106.1.1. Subtraction Concepts seventy-three 73 Practice Write the subtraction number sentence. Find the difference. 6. 7. 8. 9. Find the difference. Use if needed. 10. 1 - 0 = 11. 9 - 9 = 12. 4 - 2 = 13. 3 - 0 = 14. 6 - 1 = 15. 2 - 0 = Copyright © Macmillan/McGraw-Hill, a division of The McGraw-Hill Companies, Inc. Write the number sentence. 16. 9 baseball players are in the locker room. All 9 players run to the baseball field. How many players are left in the locker room? players 74 seventy-four Math at Home Activity: Give your child 3 objects, have them show 3 - 0 and 3 - 3 using the objects. Multi-Part Lesson Name PART A B 1 C D E F G Vertical Subtraction You can write subtraction sentences two ways. Get Ready You can subtract across or down. The answer is the same. Main Idea I will subtract across and down. xx x xx x 7 - 3 = 7 - 3 4 4 Check Subtract. 1. Copyright © Macmillan/McGraw-Hill, a division of The McGraw-Hill Companies, Inc. x 6 - 1 2. x 3. 7 - 2 5-1= 4. 9 - 3 6. 5. 6 - 2 8-3= 7. E Talk Math How is subtracting down like subtracting across? GLE 0106.2.3 Develop strategies for learning basic addition facts and related subtraction facts. Also addresses GLE 0106.1.1. Subtraction Concepts seventy-five 75 Practice Subtract. 8. 9 - 2 10. 9. 7 - 4 8-2= 11. 4 - 2 13. 12. 5 - 1 6-2= 14. 16. 15. 8 - 6 7-5= Draw a picture to solve. Then write a number sentence. 17. There are 8 crackers on the table. Alvin ate 2 crackers. How many are left? 76 seventy-six crackers Math at Home Activity: Use 9 small objects. Show subtraction by taking some objects away. Have your child write the subtraction sentence. Copyright © Macmillan/McGraw-Hill, a division of The McGraw-Hill Companies, Inc. 8 - 5 Multi-Part Lesson PART A B 1 C D E F G Name Draw a Diagram Main Idea Abby had 5 pages of stickers. She gave Matt 2 pages. How many pages of stickers does she have now? I will draw a diagram to solve a problem. What do I need to find? Circle the question. Copyright © Macmillan/McGraw-Hill, a division of The McGraw-Hill Companies, Inc. How will I solve the problem? Draw a diagram. 5 2 ? pages Is my answer reasonable? How do I know? Subtraction Concepts GLE 0106.1.2 Apply and adapt a variety of appropriate strategies to problem solving, including estimation, and reasonableness of the solution. Also addresses GLE 0106.2.3 and GLE 0106.1.1. seventy-seven 77 Remember Draw a diagram to solve. 1. Nick had 6 cherries. He ate 3 cherries. How many cherries are left? cherries 2. Kiah had 6 carrots. She gave some to Jenni. Kiah has 4 carrots left. How many carrots did she give to Jenni? carrots apples 4. There are 7 oranges in a box. Miles eats some oranges. There are 5 oranges left. How many oranges did Miles eat? oranges 78 seventy-eight Math at Home Activity: Give your child a simple subtraction problem and have him or her solve it by drawing a diagram. Copyright © Macmillan/McGraw-Hill, a division of The McGraw-Hill Companies, Inc. Draw a diagram to solve. 3. Alberto got 7 apples. He ate 1 apple. How many apples does he have now? Mid-Chapter Check Name Solve. Fill in the missing part. 1. Part Part 2. Part Part 3 7 Whole Whole 7 9 Write the subtraction number sentence. 3. Copyright © Macmillan/McGraw-Hill, a division of The McGraw-Hill Companies, Inc. Subtract. 4. 9 - 3 5. 7-2= 6. There are 9 owls. 3 owls fly away. How many owls are left? owls Subtraction Concepts 7. There are 6 horses. Some gallop away. There are 3 horses left. How many horses galloped away? horses seventy-nine 79 Color the squares to show a way to make 6. Write the addition number sentence. 8. + Add. Use 9. 7 + 2 = =6 if needed. 10. 3 + 2 = 11. 1 + 4 = 12. 5 + 2 = 13. 6 + 2 = 14. 0 + 3 = Subtract. Use if needed. 16. 5 - 0 = 17. 4 - 2 = 18. 7 - 2 = 19. 6 - 6 = 20. 9 - 3 = Copyright © Macmillan/McGraw-Hill, a division of The McGraw-Hill Companies, Inc. 15. 8 - 1 = Solve. 21. Jake has 5 orange golf balls. Liz has 3 green golf balls. How many golf balls do they have in all? + 80 eighty = golf balls Subtraction Concepts Name Multi-Part Lesson PART A 2 B Compare Groups Copyright © Macmillan/McGraw-Hill, a division of The McGraw-Hill Companies, Inc. First use this page as a workmat. Then write how many and . Circle the number that shows more. GLE 0106.2.3 Develop strategies for learning basic addition facts and related subtraction facts. Subtraction Concepts eighty-one 81 Look at the groups of animals in each picture. Write how many of each. Circle the number that shows more. 1. 2. 3. 4. Copyright © Macmillan/McGraw-Hill, a division of The McGraw-Hill Companies, Inc. 82 eighty-two Subtraction Concepts Multi-Part Lesson Name PART A 2 B Compare Groups C Get Ready Main Idea You can use counters to compare . I will compare groups of up to 9 objects. Vocabulary compare You can write a subtraction number sentence to compare. 4 - 2 = 2 red es apples yellow difference apples Copyright © Macmillan/McGraw-Hill, a division of The McGraw-Hill Companies, Inc. There are 2 more red apples than yellow apples. Check Use . Write a subtraction number sentence. Write how many more or fewer. 1. There are 7 big pumpkins. There are 2 small pumpkins. How many more big pumpkins are there than small pumpkins? - = more big pumpkins 2. E Talk Math What happens when you compare equal groups? GLE 0106.2.3 Develop strategies for learning basic addition facts and related subtraction facts. Also addresses GLE 0106.1.1. Subtraction Concepts eighty-three 83 Practice Use . Write a subtraction number sentence. Write how many more or fewer. 3. 9 butterflies are black. 5 butterflies are yellow. How many fewer butterflies are yellow than black? - = fewer butterflies 4. Sam has 5 green balloons. He also has 3 blue balloons. How many fewer blue balloons does he have than green balloons? - = fewer blue balloons - = more yellow paper clips 6. Mia has 3 red kites and 2 yellow kites. How many fewer yellow kites does she have than red kites? 84 eighty-four = fewer yellow kite Copyright © Macmillan/McGraw-Hill, a division of The McGraw-Hill Companies, Inc. 5. There are 6 yellow paper clips. There are 2 red paper clips. How many more yellow paper clips are there than red paper clips? Name Use . Write a subtraction number sentence. Write how many more or fewer. 7. Paul has some puppets. 2 puppets are ducks. 5 puppets are rabbits. How many fewer ducks does he have than rabbits? - = fewer ducks 8. There are 9 yellow leaves. There are 2 red leaves. How many more yellow leaves are there than red leaves? Copyright © Macmillan/McGraw-Hill, a division of The McGraw-Hill Companies, Inc. - = more yellow leaves 9. Nikki has 6 purple socks. She has 7 green socks. How many fewer purple socks does she have than green socks? - = fewer purple sock 10. There are 7 elephants at the zoo. There are 3 lions at the zoo. How many fewer lions are at the zoo than elephants? Subtraction Concepts = fewer lions eighty-five 85 Practice Use . Write a subtraction number sentence. Write how many more or fewer. 11. 9 butterflies are red. 5 butterflies are orange. How many fewer butterflies are orange than red? - = fewer orange butterflies 12. 8 students play the drums. 7 students play the trumpet. How many more students play the drums than trumpet? - = more student 13. How many more there than ? are - more 86 eighty-six = 14. How H many ffewer there than ? - = are fewer Math at Home Activity: Take a walk outside. Collect leaves or other objects found in nature. Create two groups with the items you collected with less than 9 items. Have your child compare the two groups and say a subtraction number sentence that tells how many more or how many fewer. Copyright © Macmillan/McGraw-Hill, a division of The McGraw-Hill Companies, Inc. Tide pools are shallow holes filled with seawater. er. Many animals live in tide pools. Use the e picture below to compare the groups. Multi-Part Lesson Name PART A B 3 C D E Subtract From Copyright © Macmillan/McGraw-Hill, a division of The McGraw-Hill Companies, Inc. First use this page as a workmat. Then draw a picture that shows a subtraction story. GLE 0106.2.3 Develop strategies for learning basic addition facts and related subtraction facts. Subtraction Concepts eighty-seven 87 Write a subtraction number sentence for each picture. 1. - = - = - = 2. Copyright © Macmillan/McGraw-Hill, a division of The McGraw-Hill Companies, Inc. 3. 88 eighty-eight Subtraction Concepts Multi-Part Lesson Name PART A B 3 C D E Subtract from 4 and 5 S Get Ready Main Idea I will subtract from 4 and 5. There are many numbers yyou can subtract from 4 and 5. I can subtract 1 from 4. 4–1=3 The difference is 3. I can subtract 2 from 4. 4–2=2 The difference is 2. Check Copyright © Macmillan/McGraw-Hill, a division of The McGraw-Hill Companies, Inc. . Subtract some cubes. Cross Start with 4 out . Write the numbers to show different ways to subtract from 4. Subtract from 4 1 1. 4- = 2. 4- = 3. 4- = 4. 4- = 3 5. E Talk Math What does difference mean in subtraction? GLE 0106.2.3 Develop strategies for learning basic addition facts and related subtraction facts. Also addresses GLE 0106.1.1. Subtraction Concepts eighty-nine 89 Practice Start with 5 . Subtract some cubes. Cross out Write the numbers. . Subtract from 5 5 6. 5- = 7. 5- = 8. 5- = 9. 5- = 10. 5- = 0 Find the difference. 12. 4 - 0 = 13. 5 - 2 = 14. 5 - 5 = 15. 4 - 2 = 16. 5 - 0 = 17. Make It Right Isabel wrote this subtraction sentence. Tell why Isabel is wrong. Make it right. 90 ninety 5–2=4 Math at Home Activity: Give your child 5 objects. Have him or her subtract different numbers from 4 or 5 and tell the difference. Copyright © Macmillan/McGraw-Hill, a division of The McGraw-Hill Companies, Inc. 11. 4 - 1 = Multi-Part Lesson Name A PART 3 B C D E Subtract from 6 and 7 S Get Ready There are many numbers you can subtract from 6 and 7. Main Idea I will subtract from 6 and 7. I subtracted 3 from 7. 7–3=4 The difference is 4. I subtracted 1 from 7. 7–1=6 The difference is 6. Check Copyright © Macmillan/McGraw-Hill, a division of The McGraw-Hill Companies, Inc. . Subtract some cubes. Start with 6 Find the difference. Write the numbers. Subtract from 6 1. 6 - 1 = 5 2. 6 - = 3. 6 - = 4. 6 - = 5. 6 - = 6. 6 - = 7. E Talk Math How do you use to show subtraction? GLE 0106.2.3 Develop strategies for learning basic addition facts and related subtraction facts. Also addresses GLE 0106.1.1. Subtraction Concepts ninety-one 91 Practice Start with 7 . Subtract some cubes. Find the difference. Write the numbers. Subtract from 7 8. 7 - = 9. 7 - = 10. 7 - = 11. 7 - = 12. 7 - = 13. 7 - = Find the difference. Use WorkMat 3 and 14. 7 - 5 = 16. 7 - 15. 6 - =4 17. 6 - =0 19. 7 - 6 = 20. E Write Math Why is the answer in subtraction called the difference? 92 ninety-two Math at Home Activity: Collect a group of 7 objects. Have your child show you how to subtract from 7. Have him or her write a subtraction sentence. Copyright © Macmillan/McGraw-Hill, a division of The McGraw-Hill Companies, Inc. 18. 5 - 0 = =6 . Multi-Part Lesson Name A PART 3 B C D E Subtract from 8 S Get Ready There are many numbers you can subtract 8. sub ac from 8 Main Idea I will subtract from 8. I subtracted 2 from 8. 8–2=6 The difference is 6. I subtracted 4 from 8. 8–4=4 The difference is 4. Check Copyright © Macmillan/McGraw-Hill, a division of The McGraw-Hill Companies, Inc. Start with 8 . Subtract some cubes. Find the difference. Write the numbers. Subtract from 8 1. 8 - 1 = 7 2. 8 - = 3. 8 - = 4. 8 - = 5. 8 - = 6. 8 - = 7. E Talk Math How do you know 8 - 5 = 3? GLE 0106.2.3 Develop strategies for learning basic addition facts and related subtraction facts. Also addresses GLE 0106.1.1. Subtraction Concepts ninety-three 93 Practice Use WorkMat 3 and . Subtract. 8. 7 - 3 = 9. 8 - 5 = 10. 8 - 1 = 11. 8 - 7 = 12. 8 - 0 = 13. 8 - 6 = 14. 8 - 2 = 15. 8 - 4 = 16. 8 - 8 = 17. 5 - 4 = 18. 6 - 5 = 19. 7 - 2 = 20. 8 - 3 = 21. 6 - 2 = Write the subtraction number sentence to tell how many purple flowers are in the garden. 94 ninety-four = purple flowers Math at Home Activity: Collect a group of 8 objects. Have your child show you all the numbers you can subtract from 8. Have him or her write a subtraction sentence to show each difference. Copyright © Macmillan/McGraw-Hill, a division of The McGraw-Hill Companies, Inc. 22. There are 8 flowers in a garden. 3 of the flowers are red. The rest are purple. Draw the garden. Multi-Part Lesson Name PART A B 3 C D E Subtract from 9 S Get Ready There are many numbers you can subtract from 9. Main Idea I will subtract from 9. I subtracted 3 from 9. 9–3=6 The difference is 6. I subtracted 4 from 9. 9–4=5 The difference is 5. Check Start with 9 . Subtract some cubes. Find the difference. Write the numbers. Copyright © Macmillan/McGraw-Hill, a division of The McGraw-Hill Companies, Inc. Subtract from 9 1. 9 - 9. E 1 = 8 2. 9 - = 3. 9 - = 4. 9 - = 5. 9 - = 6. 9 - = 7. 9 - = 8. 9 - = Talk Math How do you know when to subtract? GLE 0106.2.3 Develop strategies for learning basic addition facts and related subtraction facts. Also addresses GLE 0106.1.1. Subtraction Concepts ninety-five 95 Practice Use WorkMat 3 and . Subtract. 7 - 5 11. 9 - 3 12. 9 - 2 13. 5 - 3 14. 9 - 0 15. 9 - 5 16. 6 - 2 17. 9 - 4 18. 9 - 8 19. 7 - 7 20. 9 - 6 21. 9 - 9 22. 9 - 7 23. 9 - 1 24. 8 - 3 96 ninety-six Copyright © Macmillan/McGraw-Hill, a division of The McGraw-Hill Companies, Inc. 10. Name Solve. Use WorkMat 3 and . 25. 7 ladybugs were climbing on a fence. 3 ladybugs flew away. How many ladybugs were left? ladybugs 26. 6 pigs were rolling in the mud. 3 pigs walked away. How many pigs were left in the mud? pigs Copyright © Macmillan/McGraw-Hill, a division of The McGraw-Hill Companies, Inc. 27. There were 5 pears on the tree. 4 pears fell off the tree. How many pears were left on the tree? pear 28. Logical Thinking Mike had 9 hats. He lost 3 of them. He gave 2 away. How many hats does he have left? hats Subtraction Concepts ninety-seven 97 Practice Click on Click on . . Click on . Stamp out 9 Click the Click the . Click 4 of the you stamped. 29. How many 98 ninety-eight Click 3 of the you stamped. Click the you stamped. are left? are left? . Stamp out 9 . 31. How many . 30. How many are left? . Click 7 of the . . Click 1 of the 32. How many you stamped. are left? Math at Home Activity: Collect a group of 9 objects. Have your child show you all the numbers you can subtract from 9. Have him or her write a subtraction number sentence to show each number. Copyright © Macmillan/McGraw-Hill, a division of The McGraw-Hill Companies, Inc. Stamp out 9 Click the Stamp out 9 . Multi-Part Lesson Name PART A B 4 C Relate Addition and Subtraction Copyright © Macmillan/McGraw-Hill, a division of The McGraw-Hill Companies, Inc. First use this page as a workmat. Then write a related addition and subtraction fact. + = - = GLE 0106.3.2 Understand that addition and subtraction are inverse operations. Subtraction Concepts ninety-nine 99 Use . Write a subtraction number sentence for each picture. Then write an addition fact using the same numbers. 1. - = + = - = + = - = + = - = + = 2. 3. 100 one hundred Subtraction Concepts Copyright © Macmillan/McGraw-Hill, a division of The McGraw-Hill Companies, Inc. 4. Multi-Part Lesson Name PART A B 4 C Relate Addition and Subtraction R Get Ready Main Idea I will use related addition and subtraction facts. I know that 5 + 2 = 7. I can use that fact to find 7 – 2. They are opposite or inverse operations. Vocabulary related facts s inverse Related facts use the same numbers. These facts can help you add and subtract. Check Identify an addition fact. Use WorkMat 3 and to find a related subtraction fact. Write both facts. Copyright © Macmillan/McGraw-Hill, a division of The McGraw-Hill Companies, Inc. 1. Part Part 3 6 2. Part Part 2 4 Whole Whole 9 6 = = = = 3. E Talk Math Explain how addition and subtraction are related. GLE 0106.3.2 Understand that addition and subtraction are inverse operations. Subtraction Concepts one hundred one 101 Practice Use WorkMat 3 and to find related subtraction facts. Write the facts. 4. 6 + 3 = 9 5. 2 + 4 = 6 = = = = 6. 1 + 4 = 5 7. 3 + 4 = 7 = = = = 8. 5 + 3 = 8 9. 2 + 3 = 5 = = = = 10. 7 + 1 = 8 7-1=6 8-1=7 8-3=5 11. 2 + 4 = 6 6-6=0 9-6=3 6-2=4 102 one hundred two Math at Home Activity: Write an addition or subtraction sentence using numbers 1–9. Have your child write a related addition or subtraction fact. Copyright © Macmillan/McGraw-Hill, a division of The McGraw-Hill Companies, Inc. Circle the subtraction sentence that you could use to check each addition sentence. Multi-Part Lesson PART A B 4 C Name Main Idea I will choose a strategy to solve a problem. I had 5 toy cars. I let Rex play with 2 of the cars. How many cars do I have left? Your Mission: Find th the number b off cars Joey had left. What do I need to find? Circle the question. Copyright © Macmillan/McGraw-Hill, a division of The McGraw-Hill Companies, Inc. How will I solve the problem? One way is to act it out. cars Is my answer reasonable? How do I know? Subtraction Concepts GLE 0106.1.2 Apply and adapt a variety of appropriate strategies to problem solving, including estimation, and reasonableness of the solution. Also addresses GLE 0106.3.2. one hundred three 103 • Act it out • Draw a diagram • Write a number sentence Choose a strategy. Solve. 1. Lena had 6 books. She gave 2 to her sister. How many books does Lena have left? books 2. Jessica caught 4 frogs. 3 hopped away. How many frogs does Jessica have now? frog 9 3 paper clips ? 4. Marcus ate 5 crackers. Shani ate some crackers. Together they ate 9 crackers. How many crackers did Shani eat? crackers 104 To assess mastery of GLE 0106.1.1, see your Tennessee Assessment Book. Math at Home Activity: Take advantage of problem-solving opportunities during daily routines such as riding in the car, bedtime, doing laundry, putting away groceries, planning schedules, and so on. Copyright © Macmillan/McGraw-Hill, a division of The McGraw-Hill Companies, Inc. 3. Tate has 9 paper clips. She gave Elena 3 paper clips. How many paper clips does Tate have now? Rosa and her sister planted a flower garden. This book belongs to Copyright © Macmillan/McGraw-Hill, a division of The McGraw-Hill Companies, Inc. Count the petals on this flower. petals on this flower. petals If 3 petals fall off how many petals will be left? There are flower petals D FOLD DOW N A B roots roots lleaf eaf stem stem flower flower Flowers can also grow in fields. Copyright © Macmillan/McGraw-Hill, a division of The McGraw-Hill Companies, Inc. flowers Rosa picked 9 flowers. She gave 7 to her mother. How many flowers did she have left? C Chapter Review/Test Name Vocabulary Circle the correct answer. 1. minus 2. subtraction number sentence 7-5=2 - + 5+4=9 Concepts Fill in the missing part. 3. Part Part 4. Part Part 5 2 Whole Whole 6 8 Write the subtraction number sentence. Copyright © Macmillan/McGraw-Hill, a division of The McGraw-Hill Companies, Inc. 5. xxxxxxx Subtract. 6. 7. 7-3= Subtraction Concepts 9-4= one hundred seven 107 Write a subtraction number sentence to tell how many fewer. 8. There were 5 strawberries and 3 cherries in the bowl. How many fewer cherries were there? - = Find the difference. Use fewer cherries if needed. 9. 8 - 1 = 10. 5 - 1 = 11. 4 - 2 = 12. 7 - 2 = 13. 6 - 5 = 14. 8 - 1 = Write the related subtraction facts. 16. 2 + 5 = 7 17. There are 7 dogs in the park. 3 dogs go home. How many dogs are left? 18. Cliff ate 5 apples. Ali ate 2 apples. How many more apples did Cliff eat than Ali? dogs 108 one hundred eight more apples Subtraction Concepts Copyright © Macmillan/McGraw-Hill, a division of The McGraw-Hill Companies, Inc. 15. 6 + 2 = 8 Test Practice Name Listen as your teacher reads each problem. Choose the correct answer. A. B. 6-4= 2 4 6 10 6 - 12 = 4 12 - 4 = 8 8 + 4 = 12 12 + 4 = 16 Listen as your teacher reads each problem. Choose the correct answer. Copyright © Macmillan/McGraw-Hill, a division of The McGraw-Hill Companies, Inc. 1. 4 - 4 = 0 3. 1 2 + = - > 3 2. 4. 11 7 Subtraction Concepts 6 4 8-6=2 8-3=5 2+6=8 4+4=8 one hundred nine 109 5. 8. 5+3=8 5-3=2 3+2=5 8-3=5 8-2=5 6+3= 6 7 9 10 9. 6 birds are sitting in a tree. 0 birds fly away. How many birds are sitting in the tree? 6. 7-1=7 7-7=0 7 + 7 = 14 14 - 7 = 7 3 4 5 balloons 110 one hundred ten Subtraction Concepts Copyright © Macmillan/McGraw-Hill, a division of The McGraw-Hill Companies, Inc. 10. Tory has 5 balloons. Rona has some balloons. Together they have 7 balloons. How many balloons does Rona have? 7. 8 - 3 = 2 birds