题目内容
| 11 |
| 15 |
| 4 |
| 3 |
| 4 |
| 5 |
分析:异分母分数相加减,要先经过通分将异分母分数变为同分母分数后,再按同分母分数相加减的计算法则进行计算.
解答:解:
+
-
=
+
-
,
=
.
| 11 |
| 15 |
| 4 |
| 3 |
| 4 |
| 5 |
=
| 11 |
| 15 |
| 20 |
| 15 |
| 12 |
| 15 |
=
| 19 |
| 15 |
点评:本题考查了学生完成异分母分数加减法算式的能力.
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题目内容
| 11 |
| 15 |
| 4 |
| 3 |
| 4 |
| 5 |
| 11 |
| 15 |
| 4 |
| 3 |
| 4 |
| 5 |
| 11 |
| 15 |
| 20 |
| 15 |
| 12 |
| 15 |
| 19 |
| 15 |