efectuati
[tex] \frac{1}{8} + \frac{1}{9} + \frac{1}{6} [/tex]
[tex] \frac{7}{36}+\frac{1}{18} + \frac{5}{6}+\frac{3}{4} [/tex]
[tex] \frac{11}{18} +\frac{4}{9} + \frac{5}{6} + \frac{1}{3} [/tex]
​