Name: LESSON 17 SESSION 2 Practice Dividing a Decimal by a Whole Number Study the Example showing one way to divide a decimal by a whole number. Then solve problems 1-5. EXAMPLE EXST Or SI The temperature rises 4.8 degrees in 6 hours. The temperature rises 50 -120 by an equal amount each hour. How many degrees does it rise each hour? 40-100 You can represent this with a bar model. 30 -80 20- 4.8 degrees -60 10- 1-40 6 hours 10 20 20-0 severi tends to loot erdt gif of jobbet s amey 30--20 40--40 To find 4.8 + 6, think 6 X ? = 4.8. 4.8 = 48 tenths 6 X 8 tenths = 48 tenths 6 X 0.8 = 4.8 4.8 : 6 = 0.8 The temperature rises 0.8 degree each hour. Look at the Example. Suppose the temperature rises 5.4 degrees in 6 hours. Complete the steps to find 5.4 + 6. a. 5.4 + 6 Think: b. 5.4 = ...... H... tenths phuget 2060 . .. . .4...... X ? . . ... . ... . tenths c. 6 x .... . !. .... tenths =... .... tenths d. 5.4 + 6 = ......1.... 2 Use numbers from the box. Write the number of tenths and hundredths for each decimal. 3.5 0.79 0.35 350 35 3.5 = tenths 3.5 =. . . . ......... hundredths 7.9 79 790 0.79 =. tenths 0.79 = hundredths Curriculum Associates, LLC Copying is not permitted. Lesson 17 Divide Decimals 355