(125-9)*8的简便算法

问题描述:

(125-9)*8的简便算法
(125-9)*8
=(125*9)-(125*8)
=1125-1000
=125

不对,应该是
(125-9)*8
=125*8-9*8
=1000-72
=928
简便方法
(125-9)*8
=116*8
=928