题目内容
| 2 |
| 3 |
| 1 |
| 4 |
| 8 |
| 12 |
| () |
| 12 |
| () |
| () |
| 3 |
| 10 |
| 2 |
| 5 |
| 3 |
| 10 |
| () |
| 10 |
| () |
| () |
| 1 |
| 6 |
| 3 |
| 8 |
| () |
| 24 |
| () |
| 24 |
| () |
| () |
| 7 |
| 15 |
| 3 |
| 10 |
| () |
| () |
| () |
| () |
| () |
| () |
考点：分数的加法和减法
专题：运算顺序及法则
分析：根据分数的加法和减法法则计算即可．
解答：
解：
+
=
+
=
+
=
+
=
+
=
+
=
-
=
-
=
，
故答案为：3，
；4，
；4，9，
；
，
，
．
| 2 |
| 3 |
| 1 |
| 4 |
| 8 |
| 12 |
| 3 |
| 12 |
| 11 |
| 12 |
| 3 |
| 10 |
| 2 |
| 5 |
| 3 |
| 10 |
| 4 |
| 10 |
| 7 |
| 10 |
| 1 |
| 6 |
| 3 |
| 8 |
| 4 |
| 24 |
| 9 |
| 24 |
| 13 |
| 24 |
| 7 |
| 15 |
| 3 |
| 10 |
| 14 |
| 30 |
| 9 |
| 30 |
| 1 |
| 6 |
故答案为：3，
| 11 |
| 12 |
| 7 |
| 10 |
| 13 |
| 24 |
| 14 |
| 30 |
| 9 |
| 30 |
| 1 |
| 6 |
点评：本题考查了分数的加法和减法，熟练掌握分数的加法和减法法则是解题的关键．
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