fracciones operaciones

Calcula y simplifica:
$\frac{1}{2} + \frac{2}{3} - 3$

SOLUCIÓN

$\frac{1}{2} + \frac{2}{3} - 3$

$\frac{\color{blue}{3}\color{black}{\cdot 1}}{6}+\frac{\color{blue}{2}\color{black}{\cdot 2}}{6}-\frac{\color{blue}{6}\color{black}{\cdot 3}}{6}=$

$=\frac{3}{6}+\frac{4}{6}-\frac{18}{6}=$

$\frac{3+4-18}{6}=\frac{-11}{6}$