Respostas

2013-08-22T14:23:21-03:00
1/2ao quadrado=2/4, 1/3+1/5=8/15, 5/8.8/15=40/120 logo 4/12 logo 1/3 dai 2/4-1/3=6/12-4/12=2/12ou 1/6
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