题目内容

计算:
(1)-0.5+(-15)-(-17)-|-12|;
(2)[-22+(-2)3]-(-2)×(-3);
(3)(
1
2
-3+
5
6
-
7
12
)÷(-
1
36
);
(4)-1.6÷[(-
2
3
)2×(-3)3-22]

(5)-14+[1-(1-0.5×2)]÷|2-(-3)2|;
(6)[(-3)2-22-(-5)2(
5
6
÷
4
9
)
×(-2)4
(1)原式=-0.5-15+17-12
=-27.5+17
=-10.5;
(2)原式=(-4-8)-6
=-12-6
=-18;
(3)原式=-18+108-30+21
=81;
(4)原式=-1.6÷[
4
9
×(-27)-4]
=-1.6÷(-16)
=0.1;
(5)原式=-1+[1-(1-1)]÷7
=-1+
1
7

=-
6
7

(6)原式=(9-4-25)×
5
6
×
9
4
×16
=(-20)×
5
6
×
9
4
×16
=-600.
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