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khongem56
2 năm trước
Bài 6: Mỗi thùng đựng sách cân nặng 23,5 kg, mỗi thùng đựng vở cân nặng 26,5kg. Một xe tải chở 20 thùng sách và 20 thùng vở. Hỏi xe đó chở được bao nhiêu tấn hàng? ( Giải bằng 2 cách )
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