题目内容
有9个分数的和为1，它们的分子都是1．其中的5个是
，
，
，
，
另外4个数的分母个位数字都是5．请写出这4个分数．
| 1 |
| 3 |
| 1 |
| 7 |
| 1 |
| 9 |
| 1 |
| 11 |
| 1 |
| 33 |
| 1 |
| 3 |
| 1 |
| 7 |
| 1 |
| 9 |
| 1 |
| 11 |
| 1 |
| 33 |
| 1 |
| 5 |
| 1 |
| a |
| 1 |
| b |
| 1 |
| c |
| 1 |
| d |
| 1 |
| a |
| 1 |
| b |
| 1 |
| c |
| 1 |
| d |
| 1010 |
| 693 |
| 1010 |
| 3×3×7×11 |
| 9+77+231+693 |
| 3×3×7×11 |
| 1 |
| 77 |
| 1 |
| 9 |
| 1 |
| 3 |
| 1 |
| 1 |
1×
| 1 |
| 5 |
| 1 |
| 5 |
| 1 |
| 3 |
| 1 |
| 5 |
| 1 |
| 15 |
| 1 |
| 9 |
| 1 |
| 5 |
| 1 |
| 45 |
| 1 |
| 77 |
| 1 |
| 5 |
| 1 |
| 385 |
答：这四个分数是
| 1 |
| 5 |
| 1 |
| 15 |
| 1 |
| 45 |
| 1 |
| 385 |
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