(42十42十42)X25怎样算最简便？

Question

如题所述

Answer 1

简算：
(42十42十42)X25
=42×25×3
=(40+2)×25×3
=40×25×3+2×25×3
=1000×3+50×3
=3000+150
=3150

Answer 2

简便计算过程方法如下
解:(42+42+42)×25
=（42×3）×25
=126×25
=3150

Answer 3

原式=42×3×25=（2×21）×3×25=（2×25）×（21×3）=50×63=3150

Answer 4

先把括号里的42乘以3再乘以25

Answer 5

先算括号里的不就得了