lminhq5709v lminhq5709v

14-09-2022
Mathematics

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Hai đoạn ống nước có chiều dài lần lượt là 0,8 và 1,35.Người ta nối hai đầu ống để tạo thành một ống nước mới.Chiều dài của phần nối chung là 2/25m.Hỏi đoạn ống nước dài bao nhiêu mét ?

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