Respuestas

2012-07-15T23:03:21+02:00

SUMA:

 

26/5 +  4/5 = 30/5

45/6 + 3/6 = 48/6

134/5 + 100/5 = 200/5

34/90 + 30/90 = 64/90

56/65 + 3/65 = 59/65

 

SUSTRACCIÓN:

 

12/9 - 6/9 = 6/9

17/89 - 13/89 = 4/89

35/8 - 34/8 = 1/8

43/65 - 30/65 = 13/65

15/98 - 12/98 = 3/98