问题
解答题
计算: (1)-3÷
(2)-0.253÷(-
(3)-|-3+2
(4)-17-
|
答案
(1)原式=-9+1×(-4)+0=-13;
(2)原式=
×8+(-1 64
)=3 8
-1 8
=-3 8
;1 4
(3)原式=-
-2 3
+1 9
×(-8)=-1 9
-6 9
-1 9
=-8 9
=-15 9
;5 3
(4)原式=-1-
×(-4-9)×(-8)=-1-32=-33.4 13