题目内容
先找规律,再填数:
+
-1=
,
+
-
=
,
+
-
=
,
+
-
=
,…则
+
-(______=
.
| 1 |
| 1 |
| 1 |
| 2 |
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 4 |
| 1 |
| 2 |
| 1 |
| 12 |
| 1 |
| 5 |
| 1 |
| 6 |
| 1 |
| 3 |
| 1 |
| 30 |
| 1 |
| 7 |
| 1 |
| 8 |
| 1 |
| 4 |
| 1 |
| 56 |
| 1 |
| 2011 |
| 1 |
| 2012 |
| 1 |
| 2011×2012 |
规律:第三个分数为第二个分数的2倍,
所以,减去的数为:
×2=
.
故答案为:
.
所以,减去的数为:
| 1 |
| 2012 |
| 1 |
| 1006 |
故答案为:
| 1 |
| 1006 |
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