Respostas

2014-04-02T19:04:29-03:00
0*5=0
1/4*1/3=1/12
0+1/12=1/12

1/2+(1/3)/(5/6)
1/3 / 5/6 = 1/3 * 6/5 = 6/15 = 2/5
1/2+2/5= mmc de 2 e 5 = 10
5/10+4/10 = 9/10

espero ter ajudado!
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