题目内容
计算: (1)﹣23+(+58)﹣(﹣5);
(2)
;
(3)
;
(4)
.
(2)
(3)
(4)
解:(1)﹣23+(+58)﹣(﹣5)
=﹣23+58+5
=40;
(2)
=
2
﹣(
)
=3﹣6
=﹣3;
(3)
=
×(﹣36)﹣
×(﹣36)+
×(﹣36)
=﹣8+9﹣2
=﹣1;
(4)
=﹣1﹣
=﹣1﹣1
=﹣2.
=﹣23+58+5
=40;
(2)
=
=3﹣6
=﹣3;
(3)
=
=﹣8+9﹣2
=﹣1;
(4)
=﹣1﹣
=﹣1﹣1
=﹣2.
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