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2 năm trước
Một kho thóc có 127,5 tấn thóc.Người ta dự định chuyển đi 4/5 số thóc trong kho.Hỏi phải thuê ít nhất bao nhiêu chuyến xe để chở hết số thóc đã dự định?Biết rằng mỗi chuyến xe chở được 7,5 tấn thóc
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