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chi.says.cheese
2 năm trước
một thửa ruộng có chiều dài 120 chiều rộng bằng 3/4 chiều dài, người ta cấy lúa trên thửa ruộng đó, cứ 100m vuông thu hoạch được 50 kg thóc.hỏi người ta thu hoạch ở thửa ruộng đó bao nhiêu tạ thóc
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