\[\left( {2\frac{3}{{16}}:1\frac{3}{4} + \left( {10\frac{1}{3} - 4\frac{5}{6}} \right):2\frac{1}{5}} \right):6\frac{7}{8}\]

\[\left( {2,4 - 2,4} \right):\left( {48602,7:54,003} \right) + 811:100\]

\[\left( {7 - 3\frac{1}{9}} \right):\frac{5}{6} - \left[ {2\frac{3}{{16}}:1 - \left( {\frac{{11}}{{12}} + 2\frac{5}{6}} \right) \cdot \frac{1}{4}} \right]\]

\[\frac{{0,5 + \frac{1}{{18}}}}{{\left( {1\frac{1}{6} - \frac{7}{{18}}} \right):2,8}}\]

\[{\text{5}}\frac{1}{5} \cdot 4\frac{1}{4} + 5\frac{3}{8} \cdot 2\frac{2}{5}\]