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把几个不相等的数移多补少使这相等,而总数不变,,求出的相等的数就是平均数。我们把这类问题,叫做平均数问题。
The number of unequal number of more than make up less to make this equal, while the total number of unchanged ,, find the same number is the average. We call this type of problem the average problem.