82.52-（18.45+25.52）能巧算吗’

更新时间2018-05-01 09:45:55

82.52-（18.45+25.52）能巧算吗’

怎么简便运算？？

巧算=简便

82.52-（18.45+25.52）

=82.52-25.52-18.45

=57-18.45

=38.55

能啊 把括号去掉

82.52-（18.45+25.52）

=82.52-18.45-25.52

=82.52-25.52-18.45

=57-18.45

=38.55