Mai intai transformi in fractie
[tex]2.5 = \frac{5}{2} [/tex]
[tex]2.(2) = \frac{22 - 2}{9} = \frac{20}{9} [/tex]
Aduci la acelasi numitor
[tex] \frac{5}{2} + \frac{20}{9} = \frac{9 \times 5}{9 \times 12} + \frac{2 \times 20}{2 \times 9} = \frac{40 + 45}{18} = \frac{85}{18 } = 4.7(2)[/tex]
