\[\boxed{\text{Проверьте\ себя}\text{.\ Страница\ 41}}\]
\[\boxed{\text{Проверочная\ работа}\text{.\ Деление\ натуральных\ чисел\ и\ дроби}}\]
\[\boxed{\text{1.}}\]
\[5\ :12 = \frac{5}{12}\text{.\ \ \ }\]
\[\boxed{\text{2.}}\]
\[m\ :25 = \frac{m}{25}\text{.\ \ \ }\]
\[\boxed{\text{3.}}\]
\[15\ :(y + 5) = \frac{15}{y + 5}\text{.\ \ \ }\]
\[\boxed{\text{4.}}\]
\[10 = \frac{50}{5}\text{.\ \ \ }\]
\[\boxed{\text{5.}}\]
\[Да.\]
\[\frac{x}{4} = 8\]
\[x = 8 \cdot 4\]
\[x = 32\text{.\ \ \ }\]
\[\boxed{\text{6.}}\]
\[Да.\]
\[\frac{27}{3} = 9.\ \ \ \]
\[\boxed{\text{7.}}\]
\[Нет.\ \]
\[Числитель\ дроби - это\ \]
\[делимое,\ а\ знаменатель -\]
\[это\ делитель.\ \ \ \]
\[\boxed{\text{8.}}\]
\[Нет.\]
\[(80 - 16)\ :4 = 80\ :4 - 16\ :4 =\]
\[= 20 - 4 = 16.\ \ \]