题目内容
计算下面各题,把得数约成最简分数.
-
=
+
=
-
=
-
=
+
=
+
=
| 2 |
| 3 |
| 1 |
| 3 |
| 2 |
| 10 |
| 4 |
| 10 |
| 8 |
| 9 |
| 2 |
| 9 |
| 12 |
| 15 |
| 3 |
| 15 |
| 13 |
| 7 |
| 15 |
| 7 |
| 9 |
| 20 |
| 3 |
| 20 |
考点:分数的加法和减法
专题:运算顺序及法则
分析:同分母分数相加减,分母不变,分子相加减即可求解.
解答:
解:
-
=
+
=
-
=
-
=
+
=4
+
=
| 2 |
| 3 |
| 1 |
| 3 |
| 1 |
| 3 |
| 2 |
| 10 |
| 4 |
| 10 |
| 3 |
| 5 |
| 8 |
| 9 |
| 2 |
| 9 |
| 2 |
| 3 |
| 12 |
| 15 |
| 3 |
| 15 |
| 3 |
| 5 |
| 13 |
| 7 |
| 15 |
| 7 |
| 9 |
| 20 |
| 3 |
| 20 |
| 3 |
| 5 |
点评:本题考查了简单的分数加减法的计算,计算时要细心,注意把结果化成最简分数.
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