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用简便方法计算6/13×5/12+7/12×5/13用简便方法计算6/13×5/12+7/12×5/13用简便方法计算6/13×5/12+7/12×5/13=5/

6/13×5/12+7/12×5/13用简便方法计算
6/13×5/12+7/12×5/13用简便方法计算

6/13×5/12+7/12×5/13用简便方法计算
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