Răspuns
1. 1 miin=60 s
3 min=180 s
300s=5 min
480min=8h
48h=2zile
6h=360 min
b)5h 4 min=304 min
4 min 20 sec= 260 s
4 zile 5 h=101h
36h 1/2 zi=48h
c)120s+5min=7 min
8min+8h=488min
5s+5min=305s
d)4h 45 min+2h 15 min= 7h
23h 35 min+4h 50 min= 28h 25 min
15h 12 min+32h 35 min= 47h 47min
