bonsoir
900 min = 15 x 60 + 0 = 15 h
7 827 s = 2 x 3 600 + 627
627 = 10 x 60 + 27
= 2 h 10 min 27 s
37 min = 37 x 60 = 2 220 s
3 h 45 min 18 s = 3 x 3 600 + 45 x 60 + 18 = 13 518 s
2.9 h = 2 h + 0.9 * 60 = 2 h 54 min
1.32 h = 1 h + 0.32 * 60 = 19.2 = 0.2 x 60 = 36 = 1 h 19 min 36 s
3 h 12 min = 3 h + 12 /60 = 3.2 h
4 h 23 min 51 s = 4 h + 23/60 + 51 / 3600 = 4. 3975 h
