题目内容
把最简分数圈起来,并把其余的分数约分.
;
;
;
;
;
;
;
;
;
;
;
.
| 4 |
| 9 |
| 15 |
| 30 |
| 10 |
| 12 |
| 17 |
| 18 |
| 9 |
| 21 |
| 77 |
| 80 |
| 21 |
| 36 |
| 6 |
| 24 |
| 5 |
| 7 |
| 33 |
| 66 |
| 18 |
| 20 |
| 18 |
| 19 |
分析:在分数中,分子与分母只有公因数1的分数为最简分数.据此将最简分数找出后,将其余分数根据分数的基本性质约分即可.
解答:解:

=
=
=
=
=
=
=
=
=
=
=
=
=
=
| 15 |
| 30 |
| 15÷15 |
| 30÷15 |
| 1 |
| 2 |
| 10 |
| 12 |
| 10÷2 |
| 12÷2 |
| 5 |
| 6 |
| 9 |
| 21 |
| 9÷3 |
| 21÷3 |
| 3 |
| 7 |
| 21 |
| 36 |
| 21÷3 |
| 36÷3 |
| 7 |
| 12 |
| 6 |
| 24 |
| 6÷6 |
| 24÷6 |
| 1 |
| 4 |
| 33 |
| 66 |
| 33÷33 |
| 66÷33 |
| 1 |
| 2 |
| 18 |
| 20 |
| 18÷2 |
| 20÷2 |
| 9 |
| 10 |
点评:分数的基本性质:分数的分子与分母同时乘或除以同一个数(0除外),分数的大小不变.
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