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benam15112k3
2 năm trước
một người bán dc 150 kg trong 3 buổi .Buổi sáng người đó bán dc 60% số gạo đó ,buổi chiều bán dc 45%số gạo còn lại .Hỏi buổi tối người đó bán dc bao nhiêu kg gạo ????
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