1o分钟减7:4o第于几?
答案:2 悬赏:80 手机版
解决时间 2021-04-02 03:25
- 提问者网友：且恨且铭记
- 2021-04-01 14:26
1o分钟减7:4o第于几?
最佳答案
- 五星知识达人网友：一秋
- 2021-04-01 15:51
解：10minutes-7:40
=-(-10minutes+7:40)
=-(-10minutes+7h40minutes)
=-(7h40minutes-10minutes)
=-7h30minutes
=-(7h+0.5h)
=-7.5h.
=-(-10minutes+7:40)
=-(-10minutes+7h40minutes)
=-(7h40minutes-10minutes)
=-7h30minutes
=-(7h+0.5h)
=-7.5h.
全部回答
- 1楼网友：duile
- 2021-04-01 16:01
由于60秒为一分钟7:40可以写成7+2/3分钟，10-7-2/3=2+1/3，1/3换算成秒为20，故答案为2:20
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