Mathematics, 17.06.2021 08:00 romanlittlewood

Có bao nhiêu số tự nhiên có 5 chữ số khác nhau bắt đầu bởi số lẻ hoặc kết thúc bới số chẳn.

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Có bao nhiêu số tự nhiên có 5 chữ số khác nhau bắt đầu bởi số lẻ hoặc kết thúc bới số chẳn....