
怎样简算法
1个回答
展开全部
49又5/7 x 5/4
=(50 - 2/7)x5/4
=62.5 - 5/14
=62 + 1/2 - 5/14
=62 + 7/14 - 5/14
=62 + 1/7
=62又1/7
=(50 - 2/7)x5/4
=62.5 - 5/14
=62 + 1/2 - 5/14
=62 + 7/14 - 5/14
=62 + 1/7
=62又1/7
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