fracciones heterogeneas

2/4 + 2/5

8/15 + 2/4 =

1/2 - 1/3 =

3/6 -2/8=

2/4+ 1/3 =

1/2 + 1/3 =

2/3 - 1/4 =

9/10

1/6

5/6

31/30

5/6

5/12

4