题目内容
(1)计算:(-1)2011-(
-
)0+(
)-1;
(2)计算:(
-
)÷
;
(3)计算:
-
.
| 3 |
| 2 |
| 1 |
| 2 |
(2)计算:(
| x2 |
| x+4 |
| 16 |
| x+4 |
| x-4 |
| x |
(3)计算:
| 2m |
| m2-9 |
| 1 |
| m+3 |
(1)原式=-1-1+2=0;
(2)原式=(x-4)
=x;
(3)原式=
-
=
=
.
(2)原式=(x-4)
| x |
| x-4 |
(3)原式=
| 2m |
| (m+3)(m-3) |
| m-3 |
| (m+3)(m-3) |
| 2m-(m-3) |
| (m+3)(m-3) |
| 1 |
| m-3 |
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