Resposta:
a)
[tex] \frac{1}{2} - \frac{1}{3} = \frac{3}{6} - \frac{2}{6} = \frac{1}{6} [/tex]
b)
[tex] \frac{5}{6} - \frac{1}{3} = \frac{5}{6} - \frac{2}{6} = \frac{3}{6} = 0.5[/tex]
c)
[tex] \frac{4}{5} - \frac{2}{7} = \frac{28}{35} - \frac{10}{35} = \frac{18}{35} [/tex]
