Multiplication Unit Review

Exponents

100

4x10¹

40

200

14x10⁴

140,000

300

62x10³

6,200

400

Write 900 as a exponent.

9x10²

500

7x10x10x10x10x10. Write as an exponent.

7x10⁵

Multiply by 10s and 5s

100

When you multiply by 10,100, or 1000 does each digit shift to the left or right? 

left

200

When you multiply by 100 how many places does each digit shift?

2 

300

50x700

35,000

400

600x30

18,000

500

.412x100

41.20

Multi-digit multiplication

100

42x5 

210

200

7,128x7

49,896

300

24x15

360

400

54x47

2,538

500

27x98

2,646

Round/Estimate

100

Round 350 to the nearest hundred.

400

200

Round 928 to the nearest ten. 

930

300

Round 0.91 to the nearest tenth. 

0.9 

400

Round to estimate the answer.

151x32

150x30=4,500

500

Round to estimate the answer. 

7.65x 0.9 

8x1=8

Mis.

100

80x5 

400

200

56x71

3,976

300

Sadie is buying flowers. Each tray of flowers costs $24. If she buys 15 trays, what will the total cost be?

$360

400

Round to the nearest hundredth. 

0.709

0.71

500

Round to estimate the answer. 

3.8x6.02 

4x6=24