题目内容
计算
(1)
+(-2013)0-(
)-1+|-2|
(2)
-
(3)
-
(4)(-3ab-1)3.
(1)
| 4 |
| 1 |
| 3 |
(2)
| x+1 |
| x |
| 1 |
| x |
(3)
| a |
| a2-b2 |
| 1 |
| a+b |
(4)(-3ab-1)3.
(1)原式=2+1-3+2
=2;
(2)原式=
=
=1;
(3)原式=
-
=
;
(4)原式=(-3)3a3b-3
=-
=2;
(2)原式=
| x+1-1 |
| x |
=
| x |
| x |
=1;
(3)原式=
| a |
| a2-b2 |
| a-b |
| a2-b2 |
=
| b |
| a2-b2 |
(4)原式=(-3)3a3b-3
=-
| 27a3 |
| b3 |
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