Estimating Products With Decimals

Which estimation below would you ise to estimate the product of 4.71 x 8.3

• 4 x 8 = 32

• 4 x 9 = 36

• 5 x 8 = 40

• 5 x 9 = 45

Which estimation below would you use to estimate the product of 31.6 x 2.9

• 31 x 2= 62

• 30 x 3= 90

• 3 x 3= 9

• 30 x 2 = 60

Which estimation below would you use to round 0.8 x 9.4

• 0.8 x 9= 72

• 1 x 9 = 9

• 0 x 9 = 0

• half of 9 = 4.5

Which of the estimations below would you use to estimate the product of 0.6 x 3.81

• half of 4 = 2

• 0 x 3 = 0

• 1 x 3 = 3

• 1 x 4 = 4

Jerry finds the product of 9.5 and 6.8. Jerry says the product is 48.40. Estimate the product of 9.5 x 6.8 to tell which statements below are FALSE.

• The product is between 45 and 60.

• The product is between 54 and 70.

• The product is about 54.

• The product is about 70.

• Jerry's answer is reasonable.

Estimate : 
5.7 x 2.1

• 10

• 12

• 18

• 8

Estimate 30.3 x 9.4

• 250

• 270

• 285

• 300

Estimate this problem:
9.2 x 5.6

• 45

• 54

• 51.52

• 60

Estimate the product of 39.7 and 7.6.

• 320

• 302

• 280

• 210

Match each expression on the top with the correctly estimated product on the bottom

• 80

• 3.8 x 2.3

• 0.8

• 8.1 x 10

• 8

• 0.22 x 3.6