\[\boxed{\mathbf{234\ }\left( \mathbf{234} \right)\mathbf{.}\mathbf{\ }Еуроки\ - \ ДЗ\ без\ мороки}\]
Пояснение.
Решение.
\[1)\ \frac{10}{21} > \frac{8}{21}\]
\[2)\ \frac{8}{19} < \frac{8}{9}\]
\[3)\ \frac{4}{7} < 1\]
\[4)\ \frac{7}{4} = 1\frac{3}{4} > 1\]
\[5)\ 1 > \frac{11}{15}\]
\[6)\ \frac{11}{15} < \frac{15}{11}\]
\[7)\ 2 > \frac{5}{3} = 1\frac{2}{3}\]
\[8)\ 2 < \frac{7}{3} = 2\frac{1}{3}\]
\[\boxed{\mathbf{234}\mathbf{.}}\]
\[\angle MOD + \angle KOF = \angle DOF;\]
\[\angle MOK = \angle DOF + \angle DOF =\]
\[= 76{^\circ} + 76{^\circ} = 152{^\circ}.\]
\[Ответ:152{^\circ}.\]