Respostas

2014-04-14T12:04:26-03:00
15/30+12/30-10/30 = 17/30
1 5 1
2014-04-14T12:07:16-03:00
M.M.C de 2 5 3 e igual 30

30/2.1=15
30/5.2=12
30/3.1=10

15+12-10=17

resposta A) 17/30
2 3 2