题目内容
| 1 |
| 6 |
| 2 |
| 7 |
| 19 |
| 42 |
| 19 |
| 42 |
分析:通过观察,此题可先通分,再进行计算.
解答:解:
+
,
=
+
,
=
.
故答案为:
| 1 |
| 6 |
| 2 |
| 7 |
=
| 7 |
| 42 |
| 12 |
| 42 |
=
| 19 |
| 42 |
故答案为:
| 19 |
| 42 |
点评:此题属于异分母分数的计算,先通分,再计算.
练习册系列答案
相关题目
题目内容
| 1 |
| 6 |
| 2 |
| 7 |
| 19 |
| 42 |
| 19 |
| 42 |
| 1 |
| 6 |
| 2 |
| 7 |
| 7 |
| 42 |
| 12 |
| 42 |
| 19 |
| 42 |
| 19 |
| 42 |