87乘64+108乘29的简便算法
问题描述:
87乘64+108乘29的简便算法
答
87X64+108X29
=87X64+3X36X29
=87X64+87X36
=87X(64+36)
=87x100
=8200
我答的,我
答
87*64+29*3*36=87*64+87*36=87*(64+36)=87*100=8700
答
87X64+108X29
=87X64+3X36X29
=87X64+87X36
=87X(64+36)
=87x100
=8200