Multiplying and Dividing Decimals

Multiplying Decimals

100

 5.73

x 0.5

2.865

200

  0.40

x 0.2

0.08

300

    8.42

x   6.0

50.52

400

     7.4

x   5.3

39.22

Dividing Decimals

100

  28.38

÷6

4.73

200

  76.54

÷ 4

19.135

300

  64.4

÷5

12.88

400

  36.7

÷ 8

4.5875

Decimal Trivia

100

True/False: You must line up the decimals when multiplying?

False, you multiply like the decimals don't exist, and then move the decimals in the product based on how many decimal places are in the factors. 

200

Granny made 3 dozen cookies. If each batch of cookies called for 3.75 cups of sugar, how much sugar did Granny use to make all her cookies?

11.25 cups of sugar

300

Rascal ate 65.94 ounces of dog food last week. How many ounces of dog food did he eat each day?

9.42 oz 

You would take 65.94 divided by 7 (days in a week)

400

Mrs. Kim ran 9.06 miles every day last week, and 4.27 miles every day the week before. How many total miles did she run over the past 2 weeks?

93.31 miles

(9.06 x 7) + (4.27 x 7)