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TAG:是乙数

是乙数

甲乙两数的和是乙数的多少背

以甲乙两数的和是乙数的多少背为关键词
How much difference is there between the sum of numbers "甲" and "乙" and the number "乙"?
甲乙两数的和是乙数的多少背，这...