计算:(16分)(1)(2)(3)(4)-七年级数学

题目简介

计算:(16分)(1)(2)(3)(4)-七年级数学

题目详情

计算:(16分)
(1)                    (2)
(3)                     (4)
题型:计算题难度:中档来源:不详

答案

(1)                    (2)
解:原式="-23+58+5            " 解:原式=      
="40                            " =-
(3)                     (4)
解:原式=-×36-×36+×36         解:原式=-1-×〔3-9〕
="-18-30+21                               " =-1+1
="-27                                     " =0

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