Adding and Subtracting Fractions with Like Denominators

Adding Fractions

100

^{1/2 + 1/2 =}

2/2 or 1

200

5/12 + 2/12 =

7/12

300

8/17 + 7/17 = 

15/17

400

12/24 + 10/24 =

22/24 or 11/12

500

25/30 + 15/30 =

40/30 or  1  1/3

Subtracting Fractions

100

3/4 - 2/4 =

1/4

200

9/10 - 5/10 =

4/10 or 2/5

300

12/19 - 10/19 =

2/19

400

25/40 - 5/40 = 

20/40 or 1/2

500

95/100 - 57/100 = 

38/100 or 19/50

Mixed Addition and Subtraction - Fractions

100

5/8 + 2/8 = 

7/8

200

5/9 - 4/9 =

1/9

300

15/18 - 11/18 = 

4/18 or 2/9

400

79/147 + 63/147 =

142/147

500

29/51 + 19/21 = 

48/51

Mixed Addition and Subtraction - Fractions

100

2/5 - 1/5 =

1/5

200

10/12 - 8/12 =

2/12 or 1/6

300

12/21 + 8/21 = 

20/21

400

49/150 + 79/150 = 

128/150 or 64/75

500

92/97 - 87/97 = 

5/97

Mixed Addition and Subtraction - Fractions

100

3/7 + 2/7 =

5/7

200

5/10 + 5/10 =

10/10 or 1

300

31/35 - 22/35 = 

9/35 or 1/5

400

75/84 - 59/84 = 

16/84 or 4/21

500

99/200 + 99/200 = 

198/200 or 99/100