题目内容
计算:
(1)﹣23+(+58)﹣(﹣5);
(2)
;
(3)
;
(4)﹣14﹣
×[3﹣(﹣3)2].
(1)﹣23+(+58)﹣(﹣5);
(2)
(3)
(4)﹣14﹣
解:(1)原式=﹣23+58+5
=40;
(2)原式=
﹣
﹣
﹣
=﹣1﹣1
=﹣2;
(3)原式=﹣18﹣30+21
=﹣27;
(4)原式=﹣1﹣
×(3﹣9)
=﹣1+1
=0.
=40;
(2)原式=
=﹣1﹣1
=﹣2;
(3)原式=﹣18﹣30+21
=﹣27;
(4)原式=﹣1﹣
=﹣1+1
=0.
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