题目内容
计算：| 3 |
| x |
| 6 |
| 1-x |
| x+5 |
| x2-x |
分析：先通分，把异分母分式加减化成同分母分式相加减，计算求解即可．
解答：解：原式=
+
-
=
+
-
=
=
=
．
| 3 |
| x |
| 6 |
| x-1 |
| x+5 |
| x(x-1) |
=
| 3(x-1) |
| x(x-1) |
| 6x |
| x(x-1) |
| x+5 |
| x(x-1) |
=
| 3x-3+6x-x-5 |
| x(x-1) |
=
| 8x-8 |
| x(x-1) |
=
| 8 |
| x |
点评：异分母分式加减运算，先通分是关键，把异分母分式化为同分母分式，然后再相加减．
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