Multiplication with Estimation

42 × 17

• 42 x 10 = 420

• 42 x 20 = 800

• 42 x 10 = 42

• 40 x 20 = 800

Tags

CCSS.4.NBT.B.5

64 × 13

• 64 x 1 = 64

• 64 x 10 = 6400

• 64 x 10 = 640

• 60 x 10 = 600

Tags

CCSS.4.NBT.B.5

74 × 34

• 70 x 30 = 2,100

• 74 x 3 = 222

• 80 x 30 = 2,400

Tags

CCSS.4.NBT.B.5

82 × 36

• 82 x 30 = 2,460

• 80 x 30 = 2,400

• 80 x 20 = 1,600

• 80 x 40 = 3,200

Tags

CCSS.5.NBT.B.5

54 × 18

• 50 x 20 = 1,000

• 55 x 20 = 1,100

• 50 x 1 = 50

• 50 x 30 = 1,500

Tags

CCSS.5.NBT.B.5

45 × 48

• 40 x 50 = 2,000

• 50 x 40 = 2,000

• 50 x 50 = 2,500

• 40 x 40 = 1,600

Tags

CCSS.5.NBT.B.5

39 × 19

• 40 x 20 = 800

• 30 x 20 = 600

• 40 x 10 = 400

• 40 x 100 = 4,000

Tags

CCSS.5.NBT.B.5

Estimate the product by rounding each number to the nearest ten and then multiplying.

49 x 93 =

• 3,800

• 3,600

• 4,500

• 4,300

Tags

CCSS.4.NBT.B.5

Estimate to find the product by rounding to the nearest tens place.

56 x 41 =

• 2,400

• 2,296

• 2,500

• 2,600

Tags

CCSS.4.NBT.B.5

The soccer team has a $72 budget to buy new soccer balls. Each soccer ball costs $10. About how many soccer balls can the soccer team buy?

hint: use G x E = T

• 10 soccer balls

• 7 soccer balls

• 6 soccer balls

• 8 soccer balls

Tags

CCSS.5.NBT.B.5

CCSS.5.NBT.B.6