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157乘421+1570乘35-157乘671=(简便算法)
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157乘421+1570乘35-157乘671= (简便算法)
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答案和解析
157乘421+1570乘35-157乘671
=157乘421+157乘350-157乘671
=157×(421+350-671)
=157×100
=15700
=157乘421+157乘350-157乘671
=157×(421+350-671)
=157×100
=15700
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