Interim 3 Review

Volume and Decimals

100

2 ft long x 3 ft wide x 5 ft high = 

30 ft³

200

23 ft wide x 45 ft high x 12 ft long = 

12,420 ft³

300

18 square ft base, 15 ft height = 

270 ft³

400

345.3 ÷ 10 = 34.53

345.3 ÷ 100 = 3.453

345.3 ÷ 1,000 = 0.3453

Describe what is happening to the decimal point.

The decimal point moves one more place to the left each time. 

500

345.3 ÷ 10 = 34.53

345.3 ÷ 100 = 3.453

345.3 ÷ 1,000 = 0.3453

Explain why the decimal is moving. 

The decimal point moves over one more place value to the left each time because you're dividing the number by 10 times more each time. 

Area

100

17 feet long x 5 feet wide = 

85 ft²

200

1 and 1/2 feet long x 1 and 1/2 feet wide =  

1 and 1/4 ft²

300

25 feet wide x 37 feet long = 

925 ft²

400

3.5 ft long x 1.5 feet wide = 

5.25 ft²

500

1 and 1/3 feet wide x 3 and 1/2 feet long = 

4 and 2/3 ft²

Division and Subtraction

100

5.99 - 2.45 = 

3.54

200

2/3 - 1/6 = 

3/6 or 1/2 

300

2 ÷ 3 = 

2/3 

400

1,134 ÷ 21 = 

54

500

27 ÷ 2 = 

13.5

Multiplication and Addition

100

4.57 + 3.297 = 

7.867

200

1/2 + 1/4 = 

3/4 

300

2 x 1/5 = 

2/5 

400

34 x 23 = 

782

500

457 x 94 = 

42,958

Powers of 10

100

4.56 x 10² = 

456

200

438 ÷ 10³ =

0.438

300

23.98 ÷ 0.1 =

239.8

400

359.21 ÷ 0.01 = 

35,921

500

1234.56 x 0.01 = 

12.3456