题目内容
| 6 |
| 7 |
| 3 |
| 8 |
| 48 |
| 56 |
| 21 |
| 56 |
| 27 |
| 56 |
√
√
(判断对错)分析:此题属于异分母分数的加减法运算,先同分,再计算.计算出结果,然后做出判断.
解答:解:
-
=
-
=
.
故答案为:√.
| 6 |
| 7 |
| 3 |
| 8 |
| 48 |
| 56 |
| 21 |
| 56 |
| 27 |
| 56 |
故答案为:√.
点评:异分母分数的加减法运算,先化成同分母分数,再计算.
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| 6 |
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