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huyenhuyen27102003
2 năm trước
có 8 phòng học ,mỗi phòng học có 15 bộ bàn ghế ,mỗi bộ bàn ghế ,mỗi bộ có 2 học sinh đang ngồi học .hỏi có tất cả bao nhiêu học sinh đang ngồi học ?
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