题目内容
计算
-
+
=
.
| 2 |
| 3 |
| 5 |
| 12 |
| 1 |
| 6 |
| 5 |
| 12 |
| 5 |
| 12 |
分析:此题属于异分母分数的加减法运算,注意先同分,再计算.
解答:解:
-
+
,
=
-
+
,
=
.
故答案为:
.
| 2 |
| 3 |
| 5 |
| 12 |
| 1 |
| 6 |
=
| 8 |
| 12 |
| 5 |
| 12 |
| 2 |
| 12 |
=
| 5 |
| 12 |
故答案为:
| 5 |
| 12 |
点评:先化成同分母分数,再计算.
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