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There are 480 desks in an examination hall.The teacher number all the desks counting order starting from 1.What is the total number of digits she writes?
人气:120 ℃ 时间:2020-05-04 02:56:28
解答
There are 480 desks in an examination hall.The teacher number all the desks counting order starting from 1.What is the total number of digits she writes?
考试大厅放着480张桌子.老师把所有桌子从1开始都编了号.她会写多少个数字?
这个里面是重点词就是:digits (数字),这个数字只是指0-9,这10个数字,不能超过9.
比如:老师写:361 号桌子,那么她就写了3个digits.
现在你想想她一共写了多少个数字
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