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datdonan
2 năm trước
Một người đem trứng ra chợ để bán. Sáng bán đc 3/5 số trứng mang đi. Chiều bán giảm đi 2 lần so với buổi sáng. Trong thùng còn lại 6 quả trứng. Hỏi người đó đã đem ra chợ bán bao nhiêu quả trứng. Gấp gấp nha tui cần gấp lắm
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