题目内容
想一想,开动脑筋(找规律填数)
1,0.75,60%,
,
,
1,0.75,60%,
0.5
0.5
,| 3 |
| 7 |
| 3 |
| 7 |
0.375
0.375
,| 1 |
| 3 |
0.3
0.3
,…分析:把给出的数列化为分数:
,
,
,( ),( ),( ),
,( ),…不难发现:分母依次加1,分子都是3,由此解答.
| 3 |
| 3 |
| 3 |
| 4 |
| 3 |
| 5 |
| 3 |
| 9 |
解答:解:
=
=
,
=
,
=
=0.375,
=
=0.3;
故答案为:0.5,
,0.375,0.3.
| 3 |
| 5+1 |
| 3 |
| 6 |
| 1 |
| 2 |
| 3 |
| 6+1 |
| 3 |
| 7 |
| 3 |
| 7+1 |
| 3 |
| 8 |
| 3 |
| 9+1 |
| 3 |
| 10 |
故答案为:0.5,
| 3 |
| 7 |
点评:关键是根据给出的数列,把它们都化为分数,再找出数与数之间的关系,再归纳,总结出规律,最后由规律解决问题.
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