Multiplying Decimals

Lesson 1-7From

www.mrhammond.org/math/mathlessons/

To Multiply:

• You do not line up the factors by the decimal.• Instead, place the number with more digits on

top.• Line up the other number underneath, at the right.• Multiply• Count the number of decimal places (from the

right) in each factor.• Use the total number of decimal places in your

two factors to place the decimal in your product.

Example: 5.63 x 3.7

5.633.7x

1

2

4

4

39098

1

16+13

1

8

1

0

1

2

two

one

three.

Example: 0.53 x 2.6182.618 has more digits (4) than 0.53 (3), so it goes on top.

2.6180.53x

4

2

58

1

700

4

90

3

13000000+457

1

831

Decimal Places

three

two

five.

Try This: 6.5 x 15.3

15.36.5x

5

1

6

2

708

1

1

3

9+

54

1

99

one

one

two.