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清明節,學校組織同學們做白花,去某烈士陵園祭奠革命烈士.一年級(1)班做了51個白花,他們班有49個人.一年級二班的做的白花的數量是一年級一班人數和白花數量的總和减去23. 問:一年級二班做了多少個白花?
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