\[\boxed{\mathbf{535\ (535).}\mathbf{\ }Еуроки\ - \ ДЗ\ без\ мороки}\]
\[\textbf{а)}\ Одно\ деление\ равно\ \frac{1}{3}.\]
\[\frac{1}{3}\ :2 = \frac{1}{3} \cdot \frac{1}{2} = \frac{1}{6}\ \]
\[A\left( \frac{1}{6} \right).\]
\[\textbf{б)}\ Одно\ деление\ равно\ \frac{1}{4}.\]
\[\frac{3}{4} + \frac{1}{4}\ :2 = \frac{3}{4} + \frac{1}{4} \cdot \frac{1}{2} = \frac{3^{\backslash 2}}{4} + \frac{1}{8} =\]
\[= \frac{6 + 1}{8} = \frac{7}{8}\ \]
\[A\left( \frac{7}{8} \right).\]
\[\textbf{в)}\ Одно\ деление\ равно\ \frac{1}{6}.\]
\[\frac{5}{6} + \frac{1}{6}\ :2 = \frac{5}{6} + \frac{1}{6} \cdot \frac{1}{2} =\]
\[= \frac{5^{\backslash 2}}{6} + \frac{1}{12} = \frac{10 + 1}{12} = \frac{11}{12}\]
\[A\left( \frac{11}{12} \right)\text{.\ }\]