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Kingzone
2 năm trước
Viết số đo dưới dạng hỗn số hoặc phân số : 5dam 47dm =......m. 13kg 275g =........kg. 7km2 450dam2 =.....km2. Tính y: y×1/3+y×2/5+y=2/3. y/2+y/3-y/6=3.
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