Unit 4 Review

Multiplying Decimals

100

3.1 x 7

What is 21.7?

200

2.5 x 7.8

What is 19.5?

300

13.1 x 9.2

What is 120.52?

400

47.8 x 6.73

321.694

500

256.5 x 4.38

What is 1123.47?

Metric Conversion

100

The average staple weighs 32.4 mg. How many grams does a staple weigh?

What is 0.324 grams?

200

Elsie walked 4 kilometers. How many meters did she walk?

What is 4,000 meters?

300

7,234.2 centimeters is how many meters?

What is 72.342 meters?

400

A football field is about 105 meters long. A school bus is 1/10 the length of the corn field. What is the length of the school bus?

What is 10.5 meters?

500

Bruce's yard is 7.3 kilometers long. His driveway is 1/10 the length of the yard. What is the driveway's length in meters?

What is 730 meters?

Powers of 10

100

1,000 is equal to 10 to the power of...

What is 3?

200

24 x 10² = ?

What is 2,400?

300

Multiplying by 1/10 is the same as doing what?

What is dividing by 10?

400

7 x 1/10

What is 0.7 (or 7/10)?

500

Which two equations are true?

A. 32 ÷  10 = 3.32

B. 38 x 10 = 380

C. 31 x 1/10 = 33.1 

D. 37 x 1/10 = 3.7

What is B and D?

Multiplication

100

65 x 43

What is 2,795?

200

97 x 63

What is 6,111?

300

743 x 68

What is 50,524?

400

418 x 297

What is 124,146?

500

6,321 x 913

What is 5,771,073?

Anything goes

100

Select all correct values below that are equal to 10³

A. 1,000

B. 300

C. 10 X 3

D. 10 X 100

What is A and D?

200

Compare the 8 in 438.17 to the 8 in 82.69

What is 1/10 the value?

300

45.6 x 3.24. Estimate, then solve.

What is 138 estimated and 147.744 solved?

400

9.64 x 10³

What is 9,640?

500

There are 68 schools in the county. Each school has 1,230 students. How many students are in the county?

What is 83,640?