Adding and Subtracting Fractions, Mixed Numbers

Like Denominators

100

1/4 + 1/4

2/4 = 1/2

200

4/7 + 3/7

7/7 = 1

300

8/10 + 4/10

1 2/10 = 1 1/5

400

6/12 - 4/12

2/12 = 1/6

500

86/100 - 74/100

12/100 = 3/25

Adding Unlike Denominators

100

1/4 + 3/12

1/2

200

1/4 + 7/10

19/20

300

5/6 + 7/8 + 1/4

1 23/24

400

2/4 + 9/10

1 2/5

500

6/12 + 2/9

13/18

Subtracting Unlike Denominators

100

2/3 - 1/6

1/2

200

4/5 - 2/3

2/15

300

5/10 - 1/3

1/6

400

3/12 - 1/5

1/20

500

The coffee shop sells small bags of coffee beans. The bags come in two sizes:4/5 kilogram and 7/12 kilogram. How much more coffee does the bigger bag have?

13/60

Adding Mixed Numbers

100

6 6/14 + 4 7/14

10 13/14

200

3 3/5 + 5 4/5

9 2/5

300

3 1/4 + 3 5/8

6 7/8

400

10 8/10 + 9 7/12

20 23/60

500

Ashley took Bernice to a birthday party. The party was scheduled to last for 1 3/4 hours but Bernice stayed for 4/5 of an hour more. How long did she stay at the party?

2 11/20

Subtracting Mixed Numbers

100

5 5/6 - 3 3/6

2 1/3

200

5 4/12 - 5 1/3

0

300

3 - 1 2/6

1 2/3

400

7 1/2 - 3 1/10

4 2/5

500

Charlie had 10 ft of twine. She used 4 3/4 ft to tie up a package. Does she have enough twine left to tie up another pacakge if she needs 6 1/4 ft of twine?

5 1/4, no