Respostas

2014-05-28T17:06:28-03:00
1/2 - (-2/3) =
1/2 +2/3
mmc:2,3=6

3/6+4/6=
7/6
2 5 2
2014-05-28T17:20:54-03:00
1/2 - (-2/3) =
1/2 +2/3
mmc:2,3=6

3/6+4/6=
7/6
1 5 1