Estimating with Multiplying 2-Digit by 2-Digit

How would you estimate these factors?

53 x 72

• 50 x 70

• 53 x 70

• 53 x 72

• 50 x 73

Tags

CCSS.4.NBT.B.5

Which of these could be estimates for the factors of 29 x 44?

• 30 x 40

• 20 x 40

• 30 x 45

• 29 x 44

Tags

CCSS.4.NBT.B.5

Estimate then solve

31 x 52

• 150

• 1,612

• 1,500

• 1,000

Tags

CCSS.4.NBT.B.5

Estimate then solve

31 x 52

• 150

• 1,612

• 1,500

• 1,000

Tags

CCSS.4.NBT.B.5

Use compatible numbers to find estimates for these factors.

71 x 14

• 70 x 10

• 70 x 15

• 70 x 20

• 75 x 15

Tags

CCSS.4.NBT.B.5

Use compatible numbers to estimate. Then find the product.

23 x 29

Tags

CCSS.4.NBT.B.5

What ways could you estimate these factors?

99 x 11

• 11 x 99

• 100 x 10

• 99 x 11

• 10 x 100

Tags

CCSS.4.NBT.B.5

Estimate then solve

27 x 42

• 1100

• 120

• 1,090

• 1,200

Tags

CCSS.4.NBT.B.5

True or False: Estimating gives you the exact answer to a problem

Which of these could be estimates for the factors of 85 x 62?

• 85 x 60

• 85 x 62

• 80 x 65

• 90 x 60

Tags

CCSS.4.NBT.B.5