题目内容
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| 8 |
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| 8 |
分析:此题属于异分母分数的加减计算,先通分,再计算.
解答:解:
+
-
,
=
+
-
,
=
.
故答案为:
.
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| 8 |
=
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| 8 |
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| 8 |
=
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| 8 |
故答案为:
| 5 |
| 8 |
点评:掌握异分母分数的加减运算法则,是解题关键.
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