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