Adding and Subtracting Fractions

Decompose Fractions

100

3/8

1/8 + 1/8 + 1/8

200

5/6

2/6 + 3/6

300

4/4

2/4 + 2/4

400

2 1/2

2/2 + 2/2 + 1/2

500

10/4

2/4 + 2/4 +2/4 + 2/4 + 2/4

Add Like Fractions

100

3/8 + 3/8

6/8

200

6/12 + 4/12

10/12

300

10/20 + 15/20

25/20

400

50/100 + 50/100

100/100 = 1

500

4/9 + 3/9 + 1/9

8/9

Subtract Like Fractions

100

5/6 - 4/6

1/6

200

9/12 - 4/12

5/12

300

3/6 - 3/6

0

400

20/100 - 18/100

2/100

500

10/19 - 3/19 - 1/19

6/19

Add Mixed Numbers

100

Randy played ball for 2 5/6 hours on Saturday. He played for 1 3/6 hours on Sunday. How many hours did Randy play ball on the weekend?

3 8/6 or 4 2/6 hours

200

3 + 3 6/7

6 6/7

300

4 3/4 + 1 1/4

6

400

1 3/8 + 3 7/8

4 10/8 or 5 2/8

500

Brenda mixed 1 3/8 cups of sand with 2 7/8 cups of potting mix to prepare the soil for her plant. After mixing, how many cups of soil does Brenda have?

3 10/8 or 4 2/8

Subtract Mixed Numbers

100

3 2/3 - 1 1/3

2 1/3

200

The average weight of a basketball is 21 1/8 ounces. The average weight of a baseball is 5 2/8 ounces. How many more ounces does the basketball weigh?

15 7/8 ounces

300

2 8/12 - 1 8/12

1

400

5 3/5 - 1 4/5

3 4/5

500

Jenna has a spool that contains 5 3/4 meters of ribbon. She uses 3 2/4 meters for a school project and 1 1/4 meters for a bow. How much ribbon remains on the spool?

1 meter