Respuestas

2011-11-08T17:52:26+01:00

13/18 + 11/9 + 12/6 = 13/18 + 22/18 + 36/18 = 71/18 = 3 17/18

 

5/6 + 4 2/3 + 11 1/2 = 5/6 + 14/3 + 23/2 = 5/6 + 28/6 + 69/6 = 102/6 = 17

 

11/12 - 5/6 = 11/12 - 10/12 = 1/12