Răspuns:
1
[tex] \frac{1}{3} + \frac{2}{3} = \frac{3}{3 } = 1 \\ \frac{1}{5} + \frac{2}{5} + \frac{3}{5} = \frac{6}{5} \\ \frac{5}{36} + \frac{7}{36} + \frac{15}{36} = \frac{27}{36} \\ \frac{10}{123} + \frac{5}{123} = \frac{15}{123} \: \: \: rezolvarea[/tex]
