Svp vous pouvez m’aidez. Mercii en avance !!

Explications étape par étape:

• 1h = 60 min donc 2h = 120 min

2h30 = 120+30=150 min

• 6h = 6 × 60 = 360min

• 12h45 = 12 × 60 +45 = 720 + 45 = 765min

• 1h = 60 min = 3600 sec

2h = 2 × 3600 = 7200 sec

1min = 60sec

30 min = 30 × 60 = 1800 sec

donc 2h30min28sec = 7200+1800+28 = 9028 sec

• 3h = 3 × 3600= 10800 sec

45min = 45 × 60 = 2700 sec

3h45min55sec = 10800+2700+55=13555 sec

• 2j et 3h

1 journée = 24h

donc ça fait 2 × 24 +3=48+3=51h

• 1h = 60 min

180min = 180/60= 3h

• 375min

6h = 360

Donc 375 min = 6h15min

• 1min=60sec

10 min = 10 × 60 = 600sec

• 425sec

7min = 7×60=420 sec

425sec= 7min et 5sec

• 1j = 24h donc 48h = 2j

• 53h

53-48=5h

53h = 2j et 5h