Răspuns :
- O oră = 60 de minute
[tex] \frac{1}{3} \times 60 = \frac{60}{3} = 20[/tex] minute
- 1 minut = 60 de secunde
[tex] \frac{1}{4} \times 60 = \frac{60}{4} = 15[/tex] secunde
- 1 an = 12 luni
[tex] \frac{1}{2} \times 12 = \frac{12}{2} = 6[/tex] luni