Unit 2 Review

Place Value

100

What is the value of 3 in the number 3,500?

3,000

200

In the number 4,560, how many times greater is the value of the 5 than the value of the 6?

10 times greater

300

If 572.481 is multiplied by 10, where will the decimal point be in the product?

Between the 4 and 8

400

 Find the product 4×0.36 and explain why the decimal is placed where it is.

1.44

There are 2 digits after the decimal.

500

What number is 10 times greater than 125? What number is 1/10 of 125?

1,250

12.5

Multi-Digit Multiplication

100

Calculate 45.7x72

3,290.4

200

458×32

14,656

300

418x45

18,810

400

389 x 63

24,507

500

8,635 x 75

647,625

Decimal Rules and Estimation

100

True or False: Since 87×5=435,   does 87.0 x 5=435?

True

200

From the list, pick the two true equations that are true.

87x5=435

87x0.05=4.35

8.7x50=43.5

0.87x5.0=0.435

87x5=435

87x0.05=4.35

300

Solve 0.8 x 102

81.6

400

True or False

 Since 506 x 2= 1,012 then 5.06 x 2 = 12.12

True

500

What is the value of n if 10ⁿ = 100,000

n=5

Powers of 10

100

0.2 x 100

20

200

100 x 0.92

92

300

0.3 x 10⁴

3,000

400

94.19 x 10²

9,419

500

670.9 x 10³

670,900

Adding/Subtracting Decimals

100

0.4+0.3

0.7

200

2.5-1.2

1.3

300

3.75+2.4

6.15

400

5.06-3.89

1.17

500

12.345+7.89

20.235