题目内容
| 3 |
| 10 |
| 1 |
| 10 |
| 6 |
| 10 |
| 7 |
| 10 |
| 37 |
| 100 |
| 3 |
| 100 |
| 56 |
| 100 |
| 23 |
| 1000 |
| 2 |
| 100 |
| 95 |
| 1000 |
| 70 |
| 100 |
| 7 |
| 100 |
分析:同分母分数相加减,分子不变,分母相加减;
异分母分数相加减,先通分,变成同分母的分数相加减,再计算.
异分母分数相加减,先通分,变成同分母的分数相加减,再计算.
解答:解:
+
+
=1;
-
+
=
;
-
-
=
;
+
-
=
.
| 3 |
| 10 |
| 1 |
| 10 |
| 6 |
| 10 |
| 7 |
| 10 |
| 37 |
| 100 |
| 3 |
| 100 |
| 9 |
| 25 |
| 56 |
| 100 |
| 23 |
| 1000 |
| 2 |
| 100 |
| 517 |
| 1000 |
| 95 |
| 1000 |
| 70 |
| 100 |
| 7 |
| 100 |
| 29 |
| 40 |
点评:本题考查了分数的加减法,计算时要细心,注意把结果化成最简分数.
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