Répondre :
a) 4.30h
=4h+3/10*60=4h+180/10=4h18 min
b) 1.05h
=1h+0.5/10*60=1h+30/10=1h03 min
c) 7.35h
=7h+35/10*60=7h+210/10=7h21 min
=4h+3/10*60=4h+180/10=4h18 min
b) 1.05h
=1h+0.5/10*60=1h+30/10=1h03 min
c) 7.35h
=7h+35/10*60=7h+210/10=7h21 min