如题所述
简便计算过程方法如下
解:25×42×4
=25×4×42
=100×42
=4200
解:25×42×4
=25×4×42
=100×42
=4200
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第1个回答 2020-03-04
25x42ⅹ4
=25x4Ⅹ42
=100x42
=4200
=25x4Ⅹ42
=100x42
=4200