\[\boxed{\mathbf{656\ (656)}\mathbf{.}\mathbf{\ }Еуроки\ - \ ДЗ\ без\ мороки}\]
\[Выполним\ действия:\]
\[11 - 1\frac{7}{18} = 10\frac{18}{18} - 1\frac{7}{18} =\]
\[= 9\frac{11}{18}\]
\[\frac{5}{8} - \frac{1^{\backslash 2}}{4} = \frac{5 - 2}{8} = \frac{3}{8}\]
\[\frac{5}{8} \cdot 1\frac{23}{25} = \frac{5}{8} \cdot \frac{48}{25} = \frac{6}{5}\]
\[11\ :\frac{6}{5} = 11 \cdot \frac{5}{6} = \frac{55}{6} = 9\frac{1}{6}\]
\[Получим:\]