题目内容
计算:
(1)
;
(2)
;
(3)
;(4)
.
(1)
(2)
(3)
解:(1)原式=
﹣
+
﹣
=3﹣6
=﹣3;
(2)原式=﹣
×
﹣8×
=﹣2﹣4
=﹣6;
(3)原式=
×(﹣36)
=﹣1;
(4)原式=﹣9×
﹣[25×(﹣
)+60×
﹣2]
=﹣3﹣(﹣15+15﹣2)
=﹣3+2
=﹣1.
=3﹣6
=﹣3;
(2)原式=﹣
=﹣2﹣4
=﹣6;
(3)原式=
=﹣1;
(4)原式=﹣9×
=﹣3﹣(﹣15+15﹣2)
=﹣3+2
=﹣1.
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