resposta: 1/3 X 4/7 = 0,2 7/8 X 3/2=1,3 3/5 X 5/9=0,3 2/7 X 11/2=1,6 9/8 X 4/45=0,1 45/4 X 8/9=10 8/9 X 45/4=10
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resposta: 1/3 X 4/7 = 0,2 7/8 X 3/2=1,3 3/5 X 5/9=0,3 2/7 X 11/2=1,6 9/8 X 4/45=0,1 45/4 X 8/9=10 8/9 X 45/4=10