题目内容
计算：（1）|-2|-(1+
)0+
；
（2）(a-
)÷
．
| 2 |
| 4 |
（2）(a-
| 1 |
| a |
| a2-2a+1 |
| a |
（1）原式=2-1+2=3．
（2）原式=
÷
=
×
=
．
（2）原式=
| a2-1 |
| a |
| (a-1)2 |
| a |
| (a+1)(a-1) |
| a |
| a |
| (a-1)2 |
| a+1 |
| a-1 |
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题目内容
| 2 |
| 4 |
| 1 |
| a |
| a2-2a+1 |
| a |
| a2-1 |
| a |
| (a-1)2 |
| a |
| (a+1)(a-1) |
| a |
| a |
| (a-1)2 |
| a+1 |
| a-1 |
