38x36+62x35的简算
解:采用分配律和拆分法,
原式=38x(35+1)+62x35
=38x35+38+62x35
=35x(38+62)+38
=35x100+38
=3500+38
=3538
=38×36+62×36-62
=36×(38+62)-62
=36×100-62
=3600-62
=3538
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38×36+62×35=38×(35+1)+62×35
=38×35+38+62×35
=(38+62)×35+38
=100×35+38
=3500+38=3538