d)
[tex] \frac{4 \times 5}{6} - \frac{4 \times 1}{2} + \frac{8 \times 1}{2 \times 10} = \frac{20}{6} - \frac{4}{2} + \frac{8}{20} [/tex]
simplifici
[tex] \frac{10}{3} - 2 + \frac{4}{10} [/tex]
aduci la acelasi numitor adica 30
[tex] \frac{100 - 60 + 120}{30} = \frac{160}{30} [/tex]
