Unit 7 Day 2 - Estimating Products

What is 4.76 rounded to a friendly number that is easy to multiply?

• .47

• 4.7

• 5

• 10

Round 82 to an easy, friendly number that you can multiply.

• 83

• 82

• 80

• 8

Estimate: 4.76 x 62 =

• 240

• 300

• 220

• 62

Estimate: 87 x 6.3

• 522

• 510

• 540

• 400

Estimate: 8.4 x 3.9 =

• 32

• 27

• 36

• 40

***CHALLENGE***

Write an estimation equation and estimate the product for the equation below: 782 x 0.04 =

• 782 x 0.1 = 78.2

• 782 x 1 = 782

• 780 x 1 = 780

• 782 x 0.01 = 7.82

Estimate BOTH factors in the equation below.  Use your estimate to help you choose the CORRECT answer to the problem.

4.3 x 111 =

• 4.773

• 47.73

• 477.3

Estimate BOTH factors in the equation below.  Use your estimate to help you choose the CORRECT answer.

78 x 3.67 =

• 28.626

• 286.26

• 2862.6

***CHALLENGE***

Estimate BOTH factors in the equation below.  Use your estimate to help you choose the CORRECT answer.

93 x 0.38 =

• 0.3534

• 3.534

• 35.34

Using estimation, where would the decimal point go to make the statement true?

47 x 2.6 = 1222

• 1.222

• 12.22

• 122.2

• 1,222