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Mathematics, 22.07.2021 08:10 hfroslie9840

Cho một số tự nhiên có hai chữ số, nếu viết theo thứ tụ ngược lại ta cũng được một số tự nhiên có hai chữ số và nhỏ hơn số đã cho 9 đơn vị. Tìm số đã cho.

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Cho một số tự nhiên có hai chữ số, nếu viết theo thứ tụ ngược lại ta cũng được một số tự nhiên có ha...
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