va rog ex7(a,b,c) primului coroana pe o foaie daca puteti

a) 1leu=100 bani
[tex] \frac{3}{5} [/tex]× 100 bani= [tex] \frac{300}{5} [/tex] bani =60 bani
[tex] \frac{7}{10} [/tex]× 100 lei= [tex] \frac{700}{10} [/tex] lei= 70 lei
b) 1 an=12 luni
[tex] \frac{1}{12} [/tex]× 12 luni= 1 luna
1 saptamana= 7 zile
[tex] \frac{4}{7} [/tex]× 7 zile=[tex] \frac{28}{7} [/tex] zile= 4 zile
c) 1 ora= 60 minute
[tex] \frac{5}{6} [/tex]× 60 min=[tex] \frac{300}{6} [/tex] min= 50 min
1 zi= 24 ore
[tex] \frac{3}{4} [/tex]× 24 ore= [tex] \frac{72}{4} [/tex] ore= 18 ore