题目内容
口算.
-
=
+
=
+
=.
| 5 |
| 8 |
| 4 |
| 8 |
| 1 |
| 5 |
| 3 |
| 5 |
| 6 |
| 7 |
| 1 |
| 7 |
分析:根据同分母分数加减法的计算方法进行计算.
解答:解:
-
=
+
=
+
=1.
| 5 |
| 8 |
| 4 |
| 8 |
| 1 |
| 8 |
| 1 |
| 5 |
| 3 |
| 5 |
| 4 |
| 5 |
| 6 |
| 7 |
| 1 |
| 7 |
点评:口算时,注意运算符号和数据,然后再进一步计算.
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