Estimating Products of Multi-Digit Numbers

Jenny is estimating the product of 29 x 66. She rounds the factors to 30 x 70 and gets a product of 2,100. Is that true or false?

• true

• false

Use Mental Math to solve: 50 x 90

• 4,000

• 6,300

• 5,400

• 4,500

ROUND to estimate: 39 x 37

• 2,000

• 900

• 1,200

• 1,600

ROUND to estimate: 25 x 81

• 1,800

• 2,400

• 1,600

• 2,700

• A

• B

• C

• D

Which shows the best estimate to find 62 x 77?

• 60 x 70 = 4,200

• 60 x 80 = 4,800

• 65 x 75 = 4,875

• 62 x 100 = 6,200

Which shows the best estimate to use for estimating 37 × 63?

• 40 × 70 = 2,800

• 50 × 60 =  3,000

• 40 × 60 =  2,400

• 30 × 60 =  1,800

Estimate to find the product of 395 x 4

• 120

• 1,200

• 1,600

• 16,00

Estimate.
272 X 5=

• 1,000

• 1,300

• 1,500

• 1,200

87 x 403
estimate 

• 40,000

• 36,000

• 45,000

• 36,00