Multiply Decimals

Rules for Multiplying Decimals

• First multiply as if there is no decimal.

• Next, count the number of digits after the decimal in each factor.

• Finally, put the same number of digits behind the decimal in the product

Multiple Choice

What is the first rule for multiplying decimals?

• Line up decimals

• Multiply as if there is no decimal

• Add digits behind the decimals

• Always move decimal to the left in the product

Reorder

Place rules in the correct order

• Multiply as if there is no decimal

• Count the number of digits after the decimal in each factor

• Put the same number of digits behind the decimal in the product

1

2

3

• 1
• 2
• 3

Multiple Choice

Find the product for 0.15 x 6

• 9

• 90

• 0.09

• 0.90

Multiple Choice

3.25 x 0.1

• 0.325

• 325

• 3.25

• 32.5

Multiple Choice

2.2 x 1.2

• 26.4

• 2.54

• 25.4

• 2.64

Multiple Choice

2.56 x 3.4

• 8.704

• 8.504

• 8.604

• 8.804

Multiple Choice

0.92 x 1.6

• 1.372

• 1.572

• 1.272

• 1.472

Multiple Choice

5.83 x 7.4

• 431.42

• 43.142

• 43.132

• 43.152

Multiple Choice

23.6 x 7.1

• 166.56

• 167.46

• 166.56

• 167.56

Multiple Choice

47.8 x 3.2

• 52.96

• 152.96

• 1529.6

• 1356