1. CONFIDENTIAL1 Today we will review “Multiplying & Dividing Decimals”

2. CONFIDENTIAL 2 Multiplying Decimals by Whole Numbers 1) Multiply 0.65 x 6 3.9

3. CONFIDENTIAL 3 Multiplying Decimals by Whole Numbers 2) Multiply 9 x 0.0036 0.0324

4. CONFIDENTIAL 4 Multiplying Decimals by Whole Numbers 3) Multiply 0.0198 x 2 0.0396

5. CONFIDENTIAL 5 Multiplying Decimals by Whole Numbers 4) Ernesto bought 7 spiral notebooks. Each notebook cost $2.29, including tax. What was the total cost of the notebooks? $16.03

6. CONFIDENTIAL 6 Multiplying Decimals by Whole Numbers 5) Before sales tax, what is the total cost of three CDs selling for $13.98 each? $41.94

7. CONFIDENTIAL 7 Multiplying Decimals by Decimals 6)Multiply 27.43 x 1.089 29.87127

8. CONFIDENTIAL 8 Multiplying Decimals by Decimals 7) Multiply 0.45 x 0.053 0.02385

9. CONFIDENTIAL 9 Multiplying Decimals by Decimals 8) Multiply 0.45 x 0.05 0.0225

10. CONFIDENTIAL 10 Multiplying Decimals by Decimals 9) A steamboat travels 36.5 miles each day. How far will it travel in 6.5 days? 237.25 miles

11. CONFIDENTIAL 11 Multiplying Decimals by Decimals 10) Juan is buying a video game that costs $32.99. The sales tax is found by multiplying the cost of the video game by 0.06. What is the cost of the sales tax for the video game? $1.98

12. CONFIDENTIAL 12 Dividing Decimals by Whole Numbers 11) Divide. Round to the nearest tenth if necessary. 0.6

13. CONFIDENTIAL 13 Dividing Decimals by Whole Numbers 12) Divide. Round to the nearest tenth if necessary. 38.7

14. CONFIDENTIAL 14 Dividing Decimals by Whole Numbers 13) Divide. Round to the nearest tenth if necessary. 7.0

15. CONFIDENTIAL 15 Dividing Decimals by Whole Numbers 14) Four girls of a track team ran the 4- by-100 meter relay in a total of 46.8 seconds. What was the average time for each runner? 11.7s

16. CONFIDENTIAL 16 Dividing Decimals by Whole Numbers 15) Tyler’s father has budgeted $64.50 for his three children’s monthly allowance. Assuming they each earn the same amount, how much allowance will Tyler receive? $21.50

17. CONFIDENTIAL 17 Dividing Decimals by Decimals 16) Divide. 230

18. CONFIDENTIAL 18 Dividing Decimals by Decimals 17) Divide. 0.026

19. CONFIDENTIAL 19 Dividing Decimals by Decimals 18) Divide. 0.0492

20. CONFIDENTIAL 20 Dividing Decimals by Decimals 19) A flower garden is 11.25 meters long. Mrs. Owens wants to make a border along one side using bricks that are 0.25 meter long. How many bricks does she need? 45 bricks

21. CONFIDENTIAL 21 Dividing Decimals by Decimals 20) If a board 7.5 feet long is cut into 2.5 foot-pieces, how many pieces will there be? 3 pieces

22. CONFIDENTIAL 22 Concept Check 21) Choose the correct term or number to complete each sentence. When (multiplying, dividing) two decimals, count the number of decimal places in each factor to determine the number of decimal places in the answer.

23. CONFIDENTIAL 23 Concept Check 22) Choose the correct term or number to complete each sentence. To check your answer for a division problem, you can multiply the quotient by the (dividend, divisor).

24. CONFIDENTIAL 24 Concept Check 23) Choose the correct term or number to complete each sentence. To change the divisor into a whole number, multiply both the divisor and the dividend by the same power of (10, 100)

25. CONFIDENTIAL 25 Concept Check 24) Choose the correct term or number to complete each sentence. When dividing decimal by a whole number, place the decimal point in the quotient directly (below, above) the decimal point found in the dividend.

26. CONFIDENTIAL 26 More Practice 25) You can drive your car 19.56 miles with one gallon of gasoline. How many miles can you drive with 11.86 gallons of gasoline? 231.98 mi

27. CONFIDENTIAL 27 More Practice 26) Ron paid $6.72 for 40 sheets of stickers. What was the average price of each sheet of stickers rounded to the nearest cent? $0.17

28. CONFIDENTIAL 28 More Practice 27) Impulses in the human nervous system travel at a rate of 188 miles per hour. Find the speed in miles per minute. Round to the nearest hundredth. 3.13 miles per minute

29. CONFIDENTIAL 29 More Practice 28) The streets on Trevor’s block form a large square with each side measuring 0.3 mile. If he walks around the block twice, how far does he go? 2.4 mi

30. CONFIDENTIAL 30 More Practice 29) Nikki is buying some refrigerator magnets for her friends. Her total bill is $16.80. If magnets are $0.80 each, how many magnets is she buying? 21 magnets

31. CONFIDENTIAL 31 More Practice 30) Matt is making a scale model of a building. The model is 3.4 feet tall. The actual building is 41.48 feet tall. How many times smaller is the model than the actual building? 12.2 times smaller