A teacher wrote down on the blackboard some consecutive nature numbers starting from 1,2,3......Then he erased a certain
问题描述：
A teacher wrote down on the blackboard some consecutive nature numbers starting from 1,2,3......Then he erased a certain number from them,and the average of the rest numbers was十三又是三分之八.Try to find the number erased.
答
答案：2.3.4 被擦掉了