题目内容
(1-
)×(1-
)×(1-
)×(1-
)×(1-
)×(1-
)×(1-
)= .
| 1 |
| 3 |
| 1 |
| 5 |
| 1 |
| 7 |
| 1 |
| 9 |
| 1 |
| 11 |
| 1 |
| 13 |
| 1 |
| 15 |
考点:分数的巧算
专题:计算问题(巧算速算)
分析:通过观察,此题把每个括号内的结果求出来,然后约分即可.
解答:
解:(1-
)×(1-
)×(1-
)×(1-
)×(1-
)×(1-
)×(1-
)
=
×
×
×
×
×
×
=
故答案为:
.
| 1 |
| 3 |
| 1 |
| 5 |
| 1 |
| 7 |
| 1 |
| 9 |
| 1 |
| 11 |
| 1 |
| 13 |
| 1 |
| 15 |
=
| 2 |
| 3 |
| 4 |
| 5 |
| 6 |
| 7 |
| 8 |
| 9 |
| 10 |
| 11 |
| 12 |
| 13 |
| 14 |
| 15 |
=
| 2048 |
| 6435 |
故答案为:
| 2048 |
| 6435 |
点评:仔细观察数据,采用合理的方法计算.
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