题目内容
甲数是
,乙数是
,甲、乙两数的和是
,差是
.
| 2 |
| 3 |
| 1 |
| 4 |
| 11 |
| 12 |
| 11 |
| 12 |
| 5 |
| 12 |
| 5 |
| 12 |
分析:此题属于异分母分数的加减法计算题目,计算时,应先通分,化成同分母分数,再计算.
解答:解:
+
=
+
=
;
-
=
-
=
.
故答案为:
,
.
| 2 |
| 3 |
| 1 |
| 4 |
| 8 |
| 12 |
| 3 |
| 12 |
| 11 |
| 12 |
| 2 |
| 3 |
| 1 |
| 4 |
| 8 |
| 12 |
| 3 |
| 12 |
| 5 |
| 12 |
故答案为:
| 11 |
| 12 |
| 5 |
| 12 |
点评:异分母分数的计算方法:先通分,再计算.
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