Multiplying Two Digits

12 x 12

• 122

• 144

• 132

• 142

Tags

CCSS.4.NBT.B.5

Estimate.  58 x 61 =

• 3,000

• 4,000

• 3,600

• 360

Tags

CCSS.4.NBT.B.5

Which estimate is closest to 81 × 28?

• 80 x 20 = 1,600

• 80 x 30 = 2,400

• 90 x 20 = 1,800

• 90 x 30 = 2,700

Tags

CCSS.4.NBT.B.5

Using Mental Math, Which Product is 2,400?

• 20 x 40

• 30 x 90

• 30 x 80

• 40 x 70

Tags

CCSS.4.NBT.B.5

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

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

Estimate then solve

27 x 42

• 1100

• 120

• 1,090

• 1,200

Tags

CCSS.4.NBT.B.5