78除以78又79分之78的简便算法,
答案:5 悬赏:80 手机版
解决时间 2021-03-14 13:23
- 提问者网友:饥饿走向夜
- 2021-03-13 23:03
78除以78又79分之78的简便算法,
最佳答案
- 五星知识达人网友:酒安江南
- 2021-03-13 23:08
78除以78又79分之78
=78/(78+78/79)
=78/[78(1+1/79)]
=1/(1+1/79)
=1/(80/79)
=79/80
=78/(78+78/79)
=78/[78(1+1/79)]
=1/(1+1/79)
=1/(80/79)
=79/80
全部回答
- 1楼网友:雪起风沙痕
- 2021-03-14 00:53
=(78/78)*(78*79/78)
- 2楼网友:走死在岁月里
- 2021-03-14 00:43
可以这样算
(78/78)+[78/(78/79)]=1+79=80
(78/78)+[78/(78/79)]=1+79=80
- 3楼网友:怀裏藏嬌
- 2021-03-14 00:06
78/(78又78/79)
=78/[(78*79+78)/79]
=78*79/78*80
=79/80
=78/[(78*79+78)/79]
=78*79/78*80
=79/80
- 4楼网友:渡鹤影
- 2021-03-13 23:44
78/(78+78/79)
=78*79/(78*79+78)
=(78*79+78)/(78*79+78)-78/(78*79+78)
=1-1/(79+1)=79/80
=78*79/(78*79+78)
=(78*79+78)/(78*79+78)-78/(78*79+78)
=1-1/(79+1)=79/80
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