mettre les étapes de calcules ,mettre en minute et en seconde 3.5min= 4.25min= 250s= 1.75min=

bonsoir

3.5 minutes = 3 + 50/60 = 3 minutes et 83 secondes ou 4 minutes et 23 secondes

4.25 minutes = 4 minutes+ 25/60 =  4 minutes et 41 secondes

250 s = (4 x 60) + 10 = 4 minutes et 10 secondes

1.75 minutes = 1 minutes + 75/60 = 1.25 minutes = 1 minute et 41 secondes