题目内容
计算:
(1)
+
+
=
;
(2)
+(
-
)=
.
(1)
| 4 |
| 9 |
| 1 |
| 10 |
| 5 |
| 9 |
| 11 |
| 10 |
| 11 |
| 10 |
(2)
| 1 |
| 5 |
| 5 |
| 6 |
| 13 |
| 18 |
| 14 |
| 45 |
| 14 |
| 45 |
分析:原式各项通分并利用同分母分式的加减运算法则计算即可得到结果.
解答:解:(1)原式=(
+
)+
=
;
(2)原式=
+
=
.
| 4 |
| 9 |
| 5 |
| 9 |
| 1 |
| 10 |
| 11 |
| 10 |
(2)原式=
| 1 |
| 5 |
| 1 |
| 9 |
| 14 |
| 45 |
点评:此题考查了分式的加减法,分式加减法的关键是通分,通分的关键是找最简公分母.
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