题目内容
计算:
(1)﹣0.5+(﹣15)﹣(﹣17)﹣|﹣12|;
(2)[﹣22+(﹣2)3]﹣(﹣2)×(﹣3);
(3)(
)÷(
);
(4)
;
(5)﹣14+[1﹣(1﹣0.5×2)]÷|2﹣(﹣3)2|;
(6)[(﹣3)2﹣22﹣(﹣5)2]×
×(﹣2)4.
(1)﹣0.5+(﹣15)﹣(﹣17)﹣|﹣12|;
(2)[﹣22+(﹣2)3]﹣(﹣2)×(﹣3);
(3)(
(4)
(5)﹣14+[1﹣(1﹣0.5×2)]÷|2﹣(﹣3)2|;
(6)[(﹣3)2﹣22﹣(﹣5)2]×
解:(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÷[
×(﹣27)﹣4]
=﹣1.6÷(﹣16)
=0.1;
(5)原式=﹣1+[1﹣(1﹣1)]÷7
=﹣1+
=﹣
;
(6)原式=(9﹣4﹣25)×
×
×16
=(﹣20)×
×
×16
=﹣600.
=﹣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÷[
=﹣1.6÷(﹣16)
=0.1;
(5)原式=﹣1+[1﹣(1﹣1)]÷7
=﹣1+
=﹣
(6)原式=(9﹣4﹣25)×
=(﹣20)×
=﹣600.
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