题目内容
计算或化简:
(1)计算:|-3|+(
-1)0-(
)-2;
(2)化简:1-
÷
.
(1)计算:|-3|+(
| 5 |
|
(2)化简:1-
| a2 |
| a2-1 |
| a |
| a-1 |
(1)原式=3+1-6=-2;
(2)原式=1-
•
=1-
=
=
.
(2)原式=1-
| a2 |
| (a+1)(a-1) |
| a-1 |
| a |
| a |
| a+1 |
| a+1-a |
| a+1 |
| 1 |
| a+1 |
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