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nguyenhien1252000
2 năm trước
Đường kính của một bánh xe đạp là 0,52. a, Tính chu vi bánh xe đó là bao nhiu? b,Chiếc xe đó sẽ đi được bao nhiêu m nếu bánh xe lăn trên mặt đất 50 vòng, 80 vòng, 300 vòng?
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