Bonjour,
2h 48mn 52s + 4h 36mn 15s
on additionne chaque unité:
6h 84mn 67s
67s = 1mn +7s
on transfert 1mn dans les mn
6h 85mn 7s
85mn = 1h + 25mn
on transfert 1h dans les heures
7h 25mn 07s
4,48 h = 4h + 0,48h
0,48 * 60 = 28,8 mn
0,8mn * 60 => 48s
=> 4h 28mn 48s
3h *60*60 = |10 800s
34mn *60 = 2 040s
10 800+ 2 040+ 52 => 12 892s
2 h 26 mn 54s
X 3
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6h 78 mn 162s
162s = 162/60 => 2mn et 42s
78+ 2 = 80
80 mn = 1h 20mn
6h+1h = 7h
=> 7h 20mn 42s
Réponse :
2h48min52sec+4h36min+15sec
on convertit en sec : 2*3600+48*60+52+4*3600+36*60+15=26 707sec
on convertit en h : 26707/3600=7,41..soit 7h
il reste en sec : 26707-3600*7=1507sec
on convertit en min : 1507/60=25,11666...min=25min
il reste en sec : 26 707-3600*7-25*60=7sec
2h48min52sec+4h36min+15sec=7h25min07sec
6) 4h48hd =4h28min48sec
4h48 =
4h+0,48h=
4h+(0,48*60)min=
4h+28,8min=
4h+28min+(0,8*60)sec=4h28min48sec
7)3h34min52sec= 12 892sec
3*3600+34*60+52=12 892sec
8)2h26min54sec= 2*3600+26*60+54=8814sec
8814*3=26 442sec = 7h20min42sec
26442/3600=7,345h = 7h
26442-7*3600=1242sec
on cherche les min 1242/60=20,7min soit 20min
on cherche les sec42-3600*7-20*60=42sec
resultat : 7h20min42sec
Explications étape par étape :