1 +1 2=4 Decimals: 1 =— 1 + 8— — — = 6 8 8 9 + 9876. 5 4 3 2 1 = ? ? 8 ✹ 0 . 5 = 0.50 = 0 . 5 0 0 ✹ 123.4 5 6 7Multiplication 3— ✹ 2 4 — 2 & Division Decimal Points Everywhere This crossword puzzle points students to success with the multiplication and division of decimals. LEARNING OBJECTIVE Directions Students multiply and divide decimals. 1. Duplicate the reproducible for each student. 2. Review the multiplication of decimals as follows. a. Multiply as you would with whole numbers. 8.2 x 1 .3 24 6 82 1066 b. Put as many decimal places in the product as there are in the factors combined. 8.2 ← 1 place x 1 .3 ← 1 place 24 6 82 ← 2 places 10.66 Individual MATERIALS For each student: ✹ Decimal Points Everywhere reproducible (p. 118) 3. Review the division of decimals as follows. a. Place the decimal point in the quotient directly above decimal point in dividend. GROUPING b. Divide as you would with whole numbers. ✹ calculator (optional) 0 .89 7 ) 6 .2 3 . 7 ) 6 .2 3 56 63 63 4. Distribute the reproducible and allow students to complete it on their own. You may wish to let them use calculators. Taking It Further Encourage students to make their own decimal puzzles for classmates to solve. Use the crossword squares on the reproducible and have students write their own problems. Require them to make a key for checking. Answers Page 118: Across 3. 12.54 4. 4.7 5. 9.8 6. 27.1 7. 8.2 8. 29.01 11. 13.6 Down 1. 34.17 2. 8.8 3. 17.82 4. 4.28 5. 9.12 9. 9.1 10. 1.68 12. 3.7 Assessing Skills ✹ Are students counting decimal places from the left or the right? ✹ Encourage students to estimate to see that the answers are reasonable. The Great BIG Book of Funtastic Math © Scholastic Teaching Resources 117 Name Date Decimal Points Everywhere Can you find the decimal point in each of these answers? This crossword puzzle is sure to sharpen your skills and point you toward success with multiplication and division of decimals. 1 2 3 6 . 5 8 3 4 5 6 7 8 9 11 10 12 Find the product or quotient and write the answer in the crossword puzzle. The decimal point will occupy a square. The first one has been done for you. ACROSS 1. 5.9 × 6.2 = DOWN 36.58 1. 6.7 × 5.1 = 3. 3.3 × 3.8 = 2. 26.4 ÷ 3 = 4. 28.2 ÷ 6 = 3. 8.1 × 2.2 = 5. 19.6 ÷ 2 = 4. 2.14 × 2 = 6. 162.6 ÷ 6 = 5. 4.8 × 1.9 = 7. 49.2 ÷ 6 = 9. 36.4 ÷ 4 = 8. 87.03 ÷ 3 = 10. 1.4 × 1.2 = 11. 27.2 ÷ 2 = 118 12. 22.2 ÷ 6 = The Great BIG Book of Funtastic Math © Scholastic Teaching Resources