题目内容
| 5 |
| 6 |
| 5 |
| 6 |
| 1 |
| 3 |
| 3 |
| 5 |
分析:去掉小括号后,
-
等于0,只计算
+
即可,通分后计算.
| 5 |
| 6 |
| 5 |
| 6 |
| 1 |
| 3 |
| 3 |
| 5 |
解答:解:
-(
-
)+
,
=
-
+
+
,
=
+
,
=
.
| 5 |
| 6 |
| 5 |
| 6 |
| 1 |
| 3 |
| 3 |
| 5 |
=
| 5 |
| 6 |
| 5 |
| 6 |
| 1 |
| 3 |
| 3 |
| 5 |
=
| 5 |
| 15 |
| 9 |
| 15 |
=
| 14 |
| 15 |
点评:此题考查分数的加法与减法,采取恰当的方法进行计算使计算简便.
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