Unit 3

Addition

100

3/7 + 2/5 

1 10/25 or 1 2/5

200

3 1/2 + 2/3

4 1/6 

300

3 1/5 + 2/3

3 13/15

400

7 1/4 + 2 3/6 

10

500

Lucy ran 4/10 yard around the track. Jon ran 4/5 yard around the track. How far did they run in total? 

1 2/10 or 1 1/5 

Subtraction

100

4/9 - 1/3 

1/9

200

4 2/3 - 7/9 

3 7/9

300

2 3/7 - 1/5 

2 8/35 

400

3 1/2 - 2 7/8

5/8

500

Ms. Giese's Ice Cream comes in cartons of two sizes. The large carton hold 4 1/2 pounds. The small carton holds 1 3/4 pounds less. How much ice cream does the small carton hold? 

2 3/4 pounds. 

Multiplication

100

6/9 x 3/8

3/12 or 1/4 

200

7/8 x 2/7

1/4 

300

2 3/5 x 6

15 3/5 

400

1 3/5 x 5 1/2

8 4/5 

500

Lucy spends 4 hours a week babysitting. Her sister Lily spends 7/8 as much time babysitting. How much does Lily babysit? 

3 1/2 hours

Divison

100

12 / 3

4

200

1/8 / 2

1/10 

300

3 / 1/9 

27

400

3/4 / 5/7 

21/20 or 1 1/20 

500

Yogi has a rope 30 feet long. They must cut it into pieces that are each 1/4 foot long. What is the number of pieces Yogi will have? 

120 pieces. 

Decimals

100

Round to the nearest tenth. 

74.326

74.3

200

Round to the nearest ten: 75.231

80

300

Round to the nearest one: 37.421

37

400

Round to the nearest thousandth: 25.3786

25.379

500

Round to the nearest hundredth: 25.314

25.31