1/6×1/7÷1/6×1/7 1÷5/6-1÷6/7简便计算
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1/6×1/7÷1/6×1/7
=1/6÷1/6×1/7×1/7
=1×1/49
=1/49
1÷5/6-1÷6/7
=6/5-7/6
=36/30-35/30
=1/30
=1/6÷1/6×1/7×1/7
=1×1/49
=1/49
1÷5/6-1÷6/7
=6/5-7/6
=36/30-35/30
=1/30
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