Respostas

2014-05-04T19:27:49-03:00
1/3 - 3/4

Realizar o MMC entre as bases 3 e 4.
3  4 | 2
3  2 | 2
3  1 | 3
1  1 | 2 * 2 * 3 = 12

1/3 - 3/4 =
12:3*1/12 - 12:4*3/12 =
4 - 9/12 =
-5/12