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tn9082309
2 năm trước
một cái máy sát thóc thành gạo có tỉ lệ là 70%.(giải ra) a)Tính số gạo sát được nếu đem sát 5 tạ gạo. b)Tính số thóc đem sát để thu 5 tạ gạo
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