Respostas

2014-07-17T15:32:03-03:00
7-12 = -5 --- 20-14 = 6 ----- 50/-5 = -10 --- 6/-2 = -3
1 2 1
2014-07-17T15:35:58-03:00
A    reposta   é   30 espero ter ajudado
2 5 2