题目内容
| 5 |
| 6 |
| 4 |
| 9 |
| 7 |
| 10 |
| 1 |
| 5 |
| 3 |
| 5 |
| 1 |
| 4 |
分析:先通分,再根据同分母分数相加减的方法计算.
解答:解:
+
=
+
=
;
-
=
-
=
;
-
=
-
=
.
| 5 |
| 6 |
| 4 |
| 9 |
| 15 |
| 18 |
| 8 |
| 18 |
| 23 |
| 18 |
| 7 |
| 10 |
| 1 |
| 5 |
| 7 |
| 10 |
| 2 |
| 10 |
| 1 |
| 2 |
| 3 |
| 5 |
| 1 |
| 4 |
| 12 |
| 20 |
| 5 |
| 20 |
| 7 |
| 20 |
点评:本题考查了基本的分数加减法的运算,运算的结果要化成最简分数.
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