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Taipham1221
2 năm trước
Một cái cân Rô-béc-van chỉ có một quả cân loại 20 g. Để chia 100 g bột ra thành 4 gói nhỏ hơn có khối lượng 50g, 30g, 10g, 10g. Hãy chỉ ra cách sử dụng quả cân (có nhiều cách) Xăng có KLR là 700kg/m³. Một bình đựng đầy xăng thì có khối lượng 2 kg. Còn khi không đựng xăng thì có khối lượng 0,2 kg. Tính thể tích của bình đó ra đơn vị lít.
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