| 1 |
| 2 |
| 5 |
| 6 |
| 11 |
| 12 |
| 19 |
| 20 |
| 29 |
| 30 |
| 9701 |
| 9702 |
| 9899 |
| 9900 |
=（1-
| 1 |
| 2 |
| 1 |
| 6 |
| 1 |
| 12 |
| 1 |
| 9900 |
=1×99-（
| 1 |
| 2 |
| 1 |
| 6 |
| 1 |
| 12 |
| 1 |
| 9900 |
=99-（
| 1 |
| 1×2 |
| 1 |
| 2×3 |
| 1 |
| 3×4 |
| 1 |
| 99×100 |
=99-（1-
| 1 |
| 2 |
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 4 |
| 1 |
| 99 |
| 1 |
| 100 |
=99-（1-
| 1 |
| 100 |
=99-
| 99 |
| 100 |
=98
| 1 |
| 100 |
1/2+5/6+11/12+19/20+29/30+…+9701/9702+9899/9900．
| 1 |
| 2 |
| 5 |
| 6 |
| 11 |
| 12 |
| 19 |
| 20 |
| 29 |
| 30 |
| 9701 |
| 9702 |
| 9899 |
| 9900 |
数学人气：511 ℃时间：2019-10-10 05:53:31
优质解答
=（1-
=1×99-（
=99-（
=99-（1-
=99-（1-
=99-
=98
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