题目内容
计算: (1)﹣3﹣4+19﹣11+2
(2)﹣
(3)
(4)
.
(2)﹣
(3)
(4)
解:(1)原式=(﹣3)+(﹣4)+(﹣11)+19+2,
=﹣18+21,
=3;
(2)原式=1﹣1
=0;
(3)原式=(﹣36)×
﹣(﹣36)×
+(﹣36)×
,
=﹣27+30﹣28,
=﹣27﹣28+30,
=﹣25;
(4)原式
=﹣1﹣
×(2﹣9),
=﹣1+
,
=
.
=﹣18+21,
=3;
(2)原式=1﹣1
=0;
(3)原式=(﹣36)×
=﹣27+30﹣28,
=﹣27﹣28+30,
=﹣25;
(4)原式
=﹣1﹣
=﹣1+
=
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