题目内容
| 7 |
| 10 |
| 2 |
| 10 |
| 3 |
| 10 |
分析:根据分数加减法的计算法则进行运算.
解答:解:
-
+
,
=
+
,
=
,
=
;
| 7 |
| 10 |
| 2 |
| 10 |
| 3 |
| 10 |
=
| 5 |
| 10 |
| 3 |
| 10 |
=
| 8 |
| 10 |
=
| 4 |
| 5 |
点评:考查了分数加减法的计算法则.
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| 7 |
| 10 |
| 2 |
| 10 |
| 3 |
| 10 |
| 7 |
| 10 |
| 2 |
| 10 |
| 3 |
| 10 |
| 5 |
| 10 |
| 3 |
| 10 |
| 8 |
| 10 |
| 4 |
| 5 |