题目内容
3
+5
+7
=
| 3 |
| 4 |
| 5 |
| 6 |
| 7 |
| 8 |
17
| 11 |
| 24 |
17
.| 11 |
| 24 |
分析:直接通分,化为同分母分数相加计算即可.
解答:解:3
+5
+7
=3
+5
+7
=17
.
故答案为:17
.
| 3 |
| 4 |
| 5 |
| 6 |
| 7 |
| 8 |
=3
| 18 |
| 24 |
| 20 |
| 24 |
| 21 |
| 24 |
=17
| 11 |
| 24 |
故答案为:17
| 11 |
| 24 |
点评:异分母分数相加减,先通分,再按照同分母分数加减法计算.
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