A-A+
计算:(1)2+5-8(2)57+(-17)-(-27)(3)-0.75×(-112)÷(-
问题详情
计算:
(1)2+5-8
(2)
(3)-0.75×(-1
(4)-52+2×(-3)2-(-6)÷(-1
(5)(-24)×(
(6)421×
参考答案
(1)原式=7-8=-1;
(2)原式=57-17+27=5-1+27=67;
(3)原式=-34×(-32)×(-49)=-12;
(4)原式=-25+18-4=-11;
(5)原式=-3+8-6-8=-9;
(6)原式=14×(421+7.5-28.5)=14×400=100.
考点: