lesson 10.5

How many decimal places should we have in the product for this multiplication problem: 0.15 x 0.6

• 0

• 1

• 2

• 3

How many decimal places should we have in the product for this multiplication problem: 1.5 x 0.6

• 0

• 1

• 2

• 3

0.15 x 0.60

• 0.09
• 45
• 0.456
• 0.123

How do you know where to put the decimal?

• You count how many digits are to the right of the decimal in each number. Then you put the decimal that many spots to the left in the answer.

• You count how many digits are to the right of the decimal in the first number only. Then you put the decimal that many spots to the left in the answer.

• You count how many digits are to the right of the decimal in the second number. Then you put the decimal that many spots to the left in the answer.

• You count how many digits are to the right of the decimal in each number. Then you put the decimal that many spots to the right in the answer.

Find the product:

3 X 0.62 =

• 186

• 18.6

• 1.86

Find the product:

4 X 0.32 =

• 128

• 1.28

• .128

• 12.8

0.18 x 2.0

• 3.6
• 36
• 0.36
• 0.036

2.2 x 2.1 =

• 4.44

• 4.62

• 46.2

• 4.062