3.5.3.





;) _ _ _ _ _ _ _ _ _ : { 9, 8, 7, 6, 5, 4, 3, 2, 1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, } : / ( ) 19^2 = 361 ( 2 (360') : 45': 45 = 38 + 7 = 19*2 + 7 = 27 50': 50 = 38 + 12 12 > (19-1)/2 : _ 50 = 57 - 7 = 19*3 - 7 = 37

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