\[Страница\ 85.\]
\[\boxed{\mathbf{10.}}\]
\[10\frac{8}{9} = 10 + \frac{8}{9};а\ потом\ \]
\[воспользуемся\ \]
\[распределительным\ законом\]
\[деления\ относительно\ \]
\[сложения.\]
\[\boxed{\mathbf{11.}}\]
\[\textbf{а)}\ 16\frac{8}{9}\ :8 = 16\ :8 + \frac{8}{9}\ :8 =\]
\[= 2 + \frac{1}{9} = 2\frac{1}{9}\]
\[34\frac{4}{9}\ :2 = 34\ :2 + \frac{4}{9}\ :2 =\]
\[= 17 + \frac{2}{9} = 17\frac{2}{9}\]
\[35\frac{5}{8}\ :5 = 35\ :5 + \frac{5}{8}\ :5 =\]
\[= 7 + \frac{1}{8} = 7\frac{1}{8}\]
\[\textbf{б)}\ 120\frac{6}{7}\ :3 = 120\ :3 + \frac{6}{7}\ :3 =\]
\[= 40 + \frac{2}{7} = 40\frac{2}{7}\]
\[14\frac{7}{13}\ :7 = 14\ :7 + \frac{7}{13}\ :7 =\]
\[= 2 + \frac{1}{13} = 2\frac{1}{13}\]
\[26\frac{8}{11}\ :2 = 26\ :2 + \frac{8}{11}\ :2 =\]
\[= 13 + \frac{4}{11} = 13\frac{4}{11}\]
\[\textbf{в)}\ 64\frac{16}{21}\ :4 = 64\ :4 + \frac{16}{21}\ :4 =\]
\[= 16 + \frac{4}{21} = 16\frac{4}{21}\]
\[38\frac{6}{11}\ :2 = 38\ :2 + \frac{6}{11}\ :2 =\]
\[= 19 + \frac{3}{11} = 19\frac{3}{11}\]
\[100\frac{50}{109}\ :25 =\]
\[= 100\ :25 + \frac{50}{109}\ :25 = 4\frac{2}{109}\]
\[\boxed{\mathbf{12.}}\]
\[\textbf{а)}\frac{7}{8}\ :\frac{3}{4} > 1\]
\[\textbf{б)}\ 5\frac{9}{11}\ :13\frac{5}{7} < 1\]
\[\textbf{в)}\ 18\ :10\frac{7}{20} > 1\]
\[\textbf{г)}\frac{7}{12}\ :\frac{5}{6} < 1\ \]