Respuestas

2013-04-17T00:17:41+02:00

3/4+4/8=6/8+4/8= 10/8= 1   2/8= 1  1/4

1/2+11/7= 7/14 + 22/14= 29/14 = 2   1/14

4/6+1/2= 4/6 + 3/6= 7/6 = 1   1/6

21/12- 1/2 = 21/12 - 6/12= 15/12 = 1  3/12= 1   1/4