Addition and Subtraction of Unlike Denominators

Find the LCD

100

1/3 + 1/5

15

200

2  1/3 + 1/6

6

300

3   5/9  -  3  1/18

18

400

1/27 - 2/9

27

500

1/7 + 1/9

63

Addition # 1

100

1/3 + 1/5

8/15

200

1/6 + 5/18

8/18

300

2/5 + 3/4

1  3/20

400

7/8 + 1/9

71/72

500

1/9  +  1/7

16/63

Subtraction#1

100

1/2 - 1/3

1/6

200

2/5  -  1/3

1/15

300

5/8  - 1/4

3/8

400

2/3  -  1/6

1/2

500

5/6  -  2/5

13/30

Simplify Fraction

100

5/15

1/3

200

12/4

3

300

2/8

1/4

400

40/48

5/6

500

60/90

2/3

Simplify Improper to mixed number

100

12/5

2  2/5

200

42/4

10  1/2

300

8/5

1  3/5

400

20/6

3  2/3

500

19/8

2  3/8