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AB
In the correctly worked addition problem shown, where
the sum of the two-digit positive integers AB and BA is
the three-digit integer AAC, and A, B, and C are different digits, what is the units digit of the integer AAC?
答案:E
问题:提问小梅老师:这道题答案是不是c=0 A是1 B是9 只有这一种情况满足 答案错误? 查看答疑
问题:只能算出B等于9,求不出A和C 查看答疑

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