如题所述
简便计算过程方法如下
解:51×99
=51×(100-1)
=51×100-1×51
=5100-51
=5049
解:51×99
=51×(100-1)
=51×100-1×51
=5100-51
=5049
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第1个回答 2020-04-01
51*100-51*1
=5100-51
=5049
=5100-51
=5049