Respostas

2013-11-23T18:45:49-02:00
2-1/4+3/12-1/6
7/4+3/12-1/6     mmc de 4,12,6=12
21/12+3/12-2/12
24/12-2/12
22/12  ( Simplificamos por 2)
11/6

1 1 1