题目内容
计算:
(1)(﹣3)+(﹣4)﹣(+11)﹣(﹣9);
(2)
;
(3)
;
(4)
.
(1)(﹣3)+(﹣4)﹣(+11)﹣(﹣9);
(2)
(3)
(4)
解:(1)原式=(﹣3)+(﹣4)+(﹣11)+(+9),
=﹣18+9,
=﹣9;
(2)原式=
,
=
,
=﹣
;
(3)原式=
,
=
,
=
;
(4)原式=
,
=
,
=
.
=﹣18+9,
=﹣9;
(2)原式=
=
=﹣
(3)原式=
=
=
(4)原式=
=
=
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