问题
解答题
计算: (1)8+(-10)+(-2)-(-5) (2)2
(3)8×(-
(4)18×(-
(5)[30-(
(6)39
|
答案
(1)原式=8-10-2+5=1;
(2)原式=2
-31 7
-31 7
-52 3
=-1-9=-10;1 3
(3)原式=-8×
×4 5
=-1 16
;2 5
(4)原式=-12+(13-4)×
=-12+6=-6;2 3
(5)原式=[30-(-28-30+33)]÷(-5)=(30+25)÷(-5)=-11;
(6)原式=(40-
)×(-12)=-480+1 24
=-4791 2
.1 2