题目内容
把下面每组的分子化为12而大小不变的分数.
和
;
和
;
和
.
| 2 |
| 3 |
| 3 |
| 4 |
| 6 |
| 7 |
| 1 |
| 2 |
| 4 |
| 5 |
| 6 |
| 7 |
①
和
;
=
,
=
;
②
和
;
=
;
=
;
③
和
,
=
;
=
;
| 2 |
| 3 |
| 3 |
| 4 |
| 2 |
| 3 |
| 12 |
| 18 |
| 3 |
| 4 |
| 12 |
| 16 |
②
| 6 |
| 7 |
| 1 |
| 2 |
| 6 |
| 7 |
| 12 |
| 14 |
| 1 |
| 2 |
| 12 |
| 24 |
③
| 4 |
| 5 |
| 6 |
| 7 |
| 4 |
| 5 |
| 12 |
| 15 |
| 6 |
| 7 |
| 12 |
| 14 |
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