| 1 |
| 2 |
| 1 |
| 6 |
| 1 |
| 12 |
| 1 |
| 20 |
| 1 |
| 30 |
=6-5-（
| 1 |
| 1×2 |
| 1 |
| 2×3 |
| 1 |
| 3×4 |
| 1 |
| 4×5 |
| 1 |
| 5×6 |
=1-[（
| 1 |
| 1 |
| 1 |
| 2 |
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 4 |
| 1 |
| 4 |
| 1 |
| 5 |
| 1 |
| 5 |
| 1 |
| 6 |
=1-[1-
| 1 |
| 6 |
=
| 1 |
| 6 |
故答案为：
| 1 |
| 6 |
6-3/2-7/6-13/12-21/20-31/30= _ ．
6-
-
-
-
-
= ___ ．
| 3 |
| 2 |
| 7 |
| 6 |
| 13 |
| 12 |
| 21 |
| 20 |
| 31 |
| 30 |
数学人气：466 ℃时间：2020-04-22 18:17:31
优质解答
原式=6-1
-1
-1
1
1
，
=6-5-（
+
+
+
+
），
=1-[（
-
）+（
-
）+（
-
）+（
-
）+（
-
）]，
=1-[1-
]，
=
．
故答案为：
．
=6-5-（
=1-[（
=1-[1-
=
故答案为：
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