$(-2) - \frac{5}{6} = -2\frac{5}{6}$;
$(-2) * \frac{1}{2} = -1$;
$(-2) : 6 = -\frac{1}{3}$;
$(-2) - 11 = -13$;
$(-2) * \frac{3}{4} = -1\frac{1}{2}$;
$(-2) + \frac{2}{3} = -1\frac{1}{3}$;
$(-2) + 2,5 = 0,5$;
$(-2) : \frac{2}{7} = -7$.

$-\frac{5}{6} + \frac{2}{3} = -\frac{1}{6}$;
$-\frac{5}{6} * (-6) = -5$;
$-\frac{5}{6} - \frac{1}{6} = -1$;
$-\frac{5}{6} * 0 = 0$;
$-\frac{5}{6} + 3 = 2\frac{1}{6}$;
$-\frac{5}{6} : \frac{1}{6} = -5$;
$-\frac{5}{6} - \frac{1}{3} = -1\frac{1}{6}$;
$-\frac{5}{6} * 1\frac{1}{5} = 1$.