Estimating Decimal Products Decimal Placement

Multiply Decimals

*1 decimal place.

*10th place.

3 x 0.2 =

• 6

• 0.6

• 0.06

• 0.006

Multiply Decimals

*2 decimal places

*100th place

3 x 0.02 =

• 6

• 0.6

• 0.06

• 0.006

Multiply Decimals

*1 decimal place.

*tenths place.

3 x 0.3 =

• 9

• 0.9

• 0.09

• 0.009

Multiply Decimals

2 x 0.4 =

• 8

• 0.8

• 0.08

• 0.008

Arnold is solving this multiplication problem: 8.12 × 4.7. Which of these estimates can Arnold use to help him determine where the decimal point belongs in the product?

• 80 × 40 = 3,200

• 8 × 5 = 40

• 800 × 4 = 3,200

• 800 × 5 = 4,000

Estimate: 5 × $4.43 = n

• $20

• $22

• $24

• $26

Which is the best estimate for the expression? 4.6 × 3 =?

• 9

• 18

• 15

• 21

What is the best estimate for 3.19 x 1.94

• 3

• 4

• 5

• 6

Estimate: $16.50 × 2 = n

• $30

• $34

• $36

• $38

Multiply Decimals

2 x 0.04 =

• 8

• 0.8

• 0.08

• 0.008