Adding and Subtracting Fractions

Adding Fractions with Like Denominators

100

1/2 + 1/2

1

200

3/8 + 4/8

7/8

300

5/16 + 12/16

17/16 or 1 1/16

400

6/24 + 28/24 

34/24 or 1 10/24 or 1 5/12

500

34/60 + 53/60

87/60 or 1 27/60 or 1 9/20

Subtracting Fractions with Like Denominators

100

3/4 - 1/4

2/4 or 1/2

200

6/8 - 2/8

4/8 or 1/2

300

15/16 - 9/16 

6/16

400

21/24 - 15/24

6/24 or 1/4

500

54/60 - 17/60

34/60 or 17/30

Adding Fractions with Unlike Denominators

100

2/3 + 1/6

5/6

200

8/16 + 1/4

12/16 or 3/4

300

3/4 + 2/3

17/12 or 1 5/12

400

4/5 + 3/4

31/20 or 1 11/20

500

17/20 + 2/5

25/20 or 1 5/20 or 1 1/4

Subtracting Fractions with Unlike Denominators

100

1/2 - 1/4

1/4

200

7/10 - 3/5

1/10

300

3/4 - 3/12

6/12 or 1/2

400

20/24 - 2/3

4/24 or 1/6

500

43/60 - 1/2

13/60

Common Denominators

100

What is is the common denominator

    4 and 8

8

200

What is the common denominator of

         4 and 5

20

300

What is a the common denominator of 

         4 and 6

12 or 24

400

What is the common denominator of 

        5 and 8

40

500

What is the common denominator of

        6 and 9

18