Respuestas

2013-06-08T00:21:21+02:00
9/4 - 12/5
[45 - 48]/20
[-3] /20
-3/20

104/60 - 63/12  :::::::::: m.c.m de [60;12] = 60
[104 - 315] / 60
[-211] /60
-211/60

71/17 - 13/4 :::::::::: m.c.m de [17;4] = 68
[284 - 221] / 68
[63] / 68
63/68

2013-06-08T00:33:33+02:00
9/4 - 12/5=  45/20 - 48/20 = -3/20              104/60 - 63/12= 104/60 - 315/60 = - 211/60             71/17 - 13/4 = 284/68 - 221/68 = 63/68