Estimation and Multi Digit Multiplication Problems

Estimate 76 x 3

• 200

• 300

• 240

• 763

To solve 79 x 6 I break 79 into easier numbers. Which 2 numbers?

• 7 and 9

• 80 and 9

• 70 and 9

• 90 and 7

Estimate 325 x 6

• 2400

• 180

• 240

• 1800

Tags

CCSS.5.NBT.B.5

To solve 259 x 3 I break 259 into easier numbers. Which 3 numbers?

• 2, 5 and 9

• 200, 50 and 9

• 25, 50 and 9

• 200, 5 and 9

Estimate 788 x 8

• 6400

• 7400

• 800

• 4600

Tags

CCSS.5.NBT.B.5

To solve 89 x 4 I do the following:

80 x 4= 320

9 x 4= 36

320 x 36 =

• True

• False

To solve 634 x 5 I do the following:

600 x 5 = 3000

30 x 5 = 150

4 x 5 = 20

3000 + 150 + 20 =

• True

• False

To solve 774 x 7 I break 724 into easier numbers. Which 3 numbers?

• 72, 740, 4

• 800, 70, 4

• 800, 80, 10

• 700, 70 and 4

What is 678 x 9?

• 6789

• 612

• 6102

• 5436

What is 87 x 4?

• 248

• 348

• 464

• 324