题目内容
将算式与正确的计算结果用直线连接起来.

分析:异分母分数加减法的计算方法:先通分成同分母分数,再分母不变,把分子相加减;据此计算后再连线.
解答:解:
-
=
-
=
;
+
=
+
=
;
-
=
-
=
;
-
=
-
=
.
见下图:

| 5 |
| 6 |
| 3 |
| 4 |
| 10 |
| 12 |
| 9 |
| 12 |
| 1 |
| 12 |
| 1 |
| 8 |
| 7 |
| 12 |
| 3 |
| 24 |
| 14 |
| 24 |
| 17 |
| 24 |
| 11 |
| 12 |
| 3 |
| 8 |
| 22 |
| 24 |
| 9 |
| 24 |
| 13 |
| 24 |
| 11 |
| 15 |
| 7 |
| 10 |
| 22 |
| 30 |
| 21 |
| 30 |
| 1 |
| 30 |
见下图:
点评:此题考查异分母分数加减法的计算方法的灵活运用,把异分母分数通分成同分母分数是解决关键.
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