\[\boxed{\text{73\ (73).}\text{\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\[\textbf{а)}\ 5\frac{1}{8} + 13\frac{3}{4} =\]
\[= (5 + 13) + \left( \frac{1}{8} + \frac{3^{\backslash 2}}{4} \right) =\]
\[= 18 + \frac{1 + 6}{8} = 18 + \frac{7}{8} = 18\frac{7}{8}\]
\[\textbf{б)}\ 19\frac{5}{6} + 10\frac{1}{3} =\]
\[= (19 + 10) + \left( \frac{5}{6} + \frac{1^{\backslash 2}}{3} \right) =\]
\[= 29 + \frac{5 + 2}{6} = 29 + \frac{7}{6} =\]
\[= 29 + 1\frac{1}{6} = 30\frac{1}{6}\]