Unit 6 Review

Multiplying by Powers 0f 10

100

5.4 x 10

54

200

7.3 x 0.1

0.73

300

Which sum is equivalent to 3.5 x 0.9? 

a. 250+65

b. 25+6.5

c.2.5+0.65

d.2.5+6.5

c

400

1.7 x 100

170

500

2.6 x 0.01

0.026

Estimating

100

A rectangle is 4.6 inches long and 2.8 inches wide. What is the best estimate for the area of the rectangle? 

7 x 3 = 21 inches squared 

200

Estimate the product of 31.2 and 29.8. 

900

300

Find the range for 4.35 x 3.89. 

4 x 3 = 12

5 x 4 = 20

12-20

400

Estimate 19.45 x 22.1

20 x 20 = 40

500

Estimate 9.81 x 4.78. 

10 x 5 = 50

Multiplying Decimals

100

8.1 x 1.4 

11.34

200

2.6 x 5.4

14.04

300

25.6 x 4 

102.4 

400

62.4 x 0.5 

31.2

500

24.2 x 1.2

29.04

Multiplication Review

100

62 x 74 

4,588

200

125 x 24

3,000

300

53 x 24

1,272

400

264 x 12

3,168

500

3,451 x 26 

89,726

Addition and Subtraction Review

100

618 + 305 

923

200

753 - 366

387

300

54.36 + 6.48 

60.84 

400

25.70 + 4.79 

30.49

500

36.81 - 12.76

24.05