\[\boxed{\mathbf{Проверочная\ работа\ №1.\ Нахождение\ части\ целого}}\]
\[\boxed{\mathbf{1.}}\]
\[\frac{7}{9} \cdot 1 = \frac{7}{9}.\]
\[\boxed{\mathbf{2.}}\]
\[0,2 \cdot \frac{1}{2} = \frac{2}{10} \cdot \frac{1}{2} = \frac{1}{10} = 0,1.\]
\[\boxed{\mathbf{3.}}\]
\[12\ :6 = 2.\]
\[\boxed{\mathbf{4.}}\]
\[20\ :5 \cdot 3 = 12.\]
\[\boxed{\mathbf{5.}}\]
\[0,8\ :4 = 0,2.\]
\[\boxed{\mathbf{6.}}\]
\[\frac{6}{7} \cdot \frac{1}{3} = \frac{2}{7}.\]
\[\boxed{\mathbf{7.}}\]
\[\frac{1}{5} \cdot \frac{1}{7} = \frac{1}{35}\]
\[\mathbf{Нет.}\]
\[\boxed{\mathbf{8.}}\]
\[\mathbf{Да.}\]