Th? k? 1

Bach khoa toan th? m? Wikipedia
Theo  th?p nien : 0 10 20 30 40
50 60 70 80 90
Theo th? k? : 1 TCN 1 2
Theo thien nien k? : 1 TCN 1 2

Th? k? 1 la kho?ng th?i gian tinh t? th?i đi?m n?m 1 đ?n h?t n?m 100 , ngh?a la b?ng 100 n?m, trong l?ch Gregory .

Tham kh?o [ s?a | s?a ma ngu?n ]

L?y t? “ https://vi.wikipedia.org/w/index.php?title=Th?_k?_1&oldid=66196600 ”