Répondre :
1) 46mn = 46mn x 60s =2760s
2) 12h = 12h x 60mn = 720mn
3) 1 jour = 24h x 60mn x 60s = 86400s
4) 27s = 27s / 60s = 0.45mn
5) 85.20mn = 85.20mn / 60mn = 1.42h
6) 9900s = 9900s / (60mn x 60s) = 9900s / 3600s = 2.75h
7) 3h 26mn = (3 x 60mn) + 26mn = 180mn + 26mn = 206mn
8) 59mn 13s = (59mn x 60s) + 13s = 3540s + 13s = 3553s
9) 2h 2mn 5s = (2h x 60mn x 60s) + (2mn x 60s) + 5s = 7200s + 120s + 5s = 7325s
10) 80mn = 80mn/60mn = 1.33 = 1h + (60mn x 0.33) = 1h + 20mn
11) 328s = (328s / 60s) = 5.467 = 5mn + (60s x 0.467) = 5mn + 28s
12) 4344s = 4344s / (60mn x 60s) = 4344/3600 = 1.2066h = 1h + (60mn x 0.2066) = 1h + 12.396mn = 1h +12mn + (60s x 0.396) = 1h +12mn + 24s
13) 20h15 = (20h x 60mn) + 15mn = 1200mn + 15mn = 1215mn = 1215mn / 60mn = 20.25h
14) 5h 54s = (5h x 60mn x 60s) + 54s = 18000s + 54s = 18054s = 18054s / (60mn x 60s) = 18054s / 3600s = 5.015h
15) 12mn 48s = 12mn + (48s / 60s) = 12mn + 0.8mn = 12.8mn
16) 2,35h = (2 x 60mn) + (60mn x 0.35) = 120mn + 21mn = 141mn = 140mn / 60mn = 2.33333h = 2h + (60mn x 0.33333) = 2h + 20mn
17) 15.9mn = 15mn + (60s x 0.9) = 15mn + 54s
18) 28.6h = 28.6h - 24h = 4.6h = 1j + 4h + (60mn x 0.6) = 1j + 4h + 36mn
2) 12h = 12h x 60mn = 720mn
3) 1 jour = 24h x 60mn x 60s = 86400s
4) 27s = 27s / 60s = 0.45mn
5) 85.20mn = 85.20mn / 60mn = 1.42h
6) 9900s = 9900s / (60mn x 60s) = 9900s / 3600s = 2.75h
7) 3h 26mn = (3 x 60mn) + 26mn = 180mn + 26mn = 206mn
8) 59mn 13s = (59mn x 60s) + 13s = 3540s + 13s = 3553s
9) 2h 2mn 5s = (2h x 60mn x 60s) + (2mn x 60s) + 5s = 7200s + 120s + 5s = 7325s
10) 80mn = 80mn/60mn = 1.33 = 1h + (60mn x 0.33) = 1h + 20mn
11) 328s = (328s / 60s) = 5.467 = 5mn + (60s x 0.467) = 5mn + 28s
12) 4344s = 4344s / (60mn x 60s) = 4344/3600 = 1.2066h = 1h + (60mn x 0.2066) = 1h + 12.396mn = 1h +12mn + (60s x 0.396) = 1h +12mn + 24s
13) 20h15 = (20h x 60mn) + 15mn = 1200mn + 15mn = 1215mn = 1215mn / 60mn = 20.25h
14) 5h 54s = (5h x 60mn x 60s) + 54s = 18000s + 54s = 18054s = 18054s / (60mn x 60s) = 18054s / 3600s = 5.015h
15) 12mn 48s = 12mn + (48s / 60s) = 12mn + 0.8mn = 12.8mn
16) 2,35h = (2 x 60mn) + (60mn x 0.35) = 120mn + 21mn = 141mn = 140mn / 60mn = 2.33333h = 2h + (60mn x 0.33333) = 2h + 20mn
17) 15.9mn = 15mn + (60s x 0.9) = 15mn + 54s
18) 28.6h = 28.6h - 24h = 4.6h = 1j + 4h + (60mn x 0.6) = 1j + 4h + 36mn
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