\[\left( 3\frac{5}{6} - 4\frac{1}{2} \right) \cdot \left( 3\frac{4}{5} - 0,55 \right) =\]
\[= - \left( 4\frac{3}{6} - 3\frac{5}{6} \right) \cdot \left( 3\frac{4}{5} - \frac{11}{20} \right) =\]
\[= - \left( 3\frac{9}{6} - 3\frac{5}{6} \right) \cdot \left( 3\frac{16}{20} - \frac{11}{20} \right) =\]
\[= - \frac{4}{6} \cdot 3\frac{5}{20} = - \frac{4 \cdot 65}{6 \cdot 20} =\]
\[= - \frac{13}{6} = - 2\frac{1}{6}\]