
6/13×5/12+7/12×5/13用简便方法计算
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6/13×5/12+7/12×5/13
=5/13×6/12+7/12×5/13
=5/13×(6/12+7/12)
=5/13×13/12
=5/12
=5/13×6/12+7/12×5/13
=5/13×(6/12+7/12)
=5/13×13/12
=5/12
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6/13×5/12+7/12×5/13
=5/13×6/12+7/12×5/13
=5/13×(6/12+7/12)
=5/13×1
=5/13
=5/13×6/12+7/12×5/13
=5/13×(6/12+7/12)
=5/13×1
=5/13
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展开全部
6/13×5/12+7/12×5/13
=5/13×6/12+7/12×5/13
=5/13×(6/12+7/12)
=5/13×13/12
=5/12
=5/13×6/12+7/12×5/13
=5/13×(6/12+7/12)
=5/13×13/12
=5/12
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