题目内容
| 2 |
| 7 |
| 5 |
| 7 |
分析:通过观察,此题属于同分母分数的加法计算,只把分子相加,分母不变,据此解答.
解答:解:
+
=
=1.
故选:C.
| 2 |
| 7 |
| 5 |
| 7 |
| 7 |
| 7 |
故选:C.
点评:掌握同分母分数的加法计算的法则,即可解决本题.
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