题目内容
| 1 |
| 12 |
| 1 |
| ( ) |
| 1 |
| ( ) |
| 1 |
| ( ) |
| 1 |
| ( ) |
| 1 |
| ( ) |
| 1 |
| ( ) |
分析:先找分母是12的分数,然后将分子相差1的化简后分子都是1的两个数找出,如
-
=
,
-
=
,
-
=
,据此即可解答.
| 2 |
| 12 |
| 1 |
| 12 |
| 1 |
| 12 |
| 3 |
| 12 |
| 2 |
| 12 |
| 1 |
| 12 |
| 4 |
| 12 |
| 3 |
| 12 |
| 1 |
| 12 |
解答:解:
=
-
=
-
=
-
.
| 1 |
| 12 |
| 1 |
| 3 |
| 1 |
| 4 |
| 1 |
| 6 |
| 1 |
| 12 |
| 1 |
| 4 |
| 1 |
| 6 |
点评:根据分数的基本性质,把分数的分子和分母同时扩大或缩小相同的倍数,然后再进行分数的拆项即可.
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