A snail wants to climb a wall of 10 feet high.During the day
A snail wants to climb a wall of 10 feet high.During the day it can climb 3 feet ,but at night it slides down 2 feet,which means that the whole day it manages to advance only by one foot.How many days will it take the snail to reach the top of the wall.
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一只蜗牛爬10尺的墙,一天白天能爬3尺,晚上要滑下去两尺,问它要爬几天
前面7天,一天只能净增加1尺.第8天白天爬三尺就到顶了,所以一共8天
前面7天,一天只能净增加1尺.第8天白天爬三尺就到顶了,所以一共8天
1年前
8
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你能帮帮他们吗