题目内容
(1+
)÷(1-
)×(1+
)÷(1-
)×(1+
)÷(1-
)×(1+
)÷(1-
)= .
| 1 |
| 2 |
| 1 |
| 4 |
| 1 |
| 6 |
| 1 |
| 8 |
| 1 |
| 10 |
| 1 |
| 12 |
| 1 |
| 14 |
| 1 |
| 16 |
考点:分数的巧算
专题:计算问题(巧算速算)
分析:先求出每个算式的结果,然后把除法转变为乘法,约分计算.
解答:
解:(1+
)÷(1-
)×(1+
)÷(1-
)×(1+
)÷(1-
)×(1+
)÷(1-
)
=
÷
×
÷
×
÷
×
÷
=
×
×
×
×
×
×
×
=
故答案为:
.
| 1 |
| 2 |
| 1 |
| 4 |
| 1 |
| 6 |
| 1 |
| 8 |
| 1 |
| 10 |
| 1 |
| 12 |
| 1 |
| 14 |
| 1 |
| 16 |
=
| 3 |
| 2 |
| 3 |
| 4 |
| 7 |
| 6 |
| 7 |
| 8 |
| 11 |
| 10 |
| 11 |
| 12 |
| 15 |
| 14 |
| 15 |
| 16 |
=
| 3 |
| 2 |
| 4 |
| 3 |
| 7 |
| 6 |
| 8 |
| 7 |
| 11 |
| 10 |
| 12 |
| 11 |
| 15 |
| 14 |
| 16 |
| 15 |
=
| 128 |
| 35 |
故答案为:
| 128 |
| 35 |
点评:此题主要通过乘除法的转化,运用了约分进行计算.
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