Question

Reduza ao mesmo denominador e calcule simplificando quando possível:

Answer 1

$\frac{2}{5} + \frac{1}{5} = \frac{10 + 5}{25} = \frac{15}{25} = \frac{3}{5}$
$\frac{7}{9} - \frac{1}{6} = \frac{42 - 9}{54} = \frac{33}{54} = \frac{11}{18}$
$\frac{1}{4} + \frac{2}{8} = \frac{8 + 8}{32} = \frac{16}{32} = \frac{1}{2}$
$\frac{7}{6} - \frac{3}{5} = \frac{35 -18}{30} = \frac{17}{30}$