EXERCITIUL 1
a)120min=2ore
720sec=12min
3ore=180min
4min=240sec
b)4sec=40dec
2sec=200ani
30ani=3decenii
300ani=30dec
c)50sec=5milenii
20dec=20mil
300ani=3mil
3000ani=30sec
EXERCITIUL 2
A=F
B=A
C=F
D=A
E=A
F=A
EX 3)14 si 30 min-15 min=14si 15 a juns Petru
14si 30min+13 min=14si 43 min a ajuns Robert
15 min=
