\[\boxed{\mathbf{Проверочная\ работа\ №2.\ Деление\ на\ десятичную\ дробь}}\]
\[\boxed{\text{1.}}\]
\[28\ :0,1 = 280.\ \ \ \]
\[\boxed{\text{2.}}\]
\[5,55\ :0,01 = 555.\ \ \ \]
\[\boxed{\text{3.}}\]
\[0,64\ :0,8 = 6,4\ :8 = 0,8.\ \ \ \]
\[\boxed{\text{4.}}\]
\[0,015\ :0,05 = 1,5\ :5 = 0,3.\ \ \ \]
\[\boxed{\text{5.}}\]
\[4\ :0,4 = 40\ :4 = 10\ \left( \frac{км}{ч} \right) -\]
\[скорость\ Димы.\ \]
\[Ответ:10\ \frac{км}{ч}\text{.\ \ \ }\]
\[\boxed{\text{6.}}\]
\[9\ :4,5 = 90\ :45 = 2\ (ч) -\]
\[были\ в\ пути\ туристы.\ \]
\[Ответ:2\ ч.\ \ \]
\[\boxed{\text{7.}}\]
\[Да.\ \]
\[93,31\ :0,31 = 301.\ \ \ \ \]
\[\boxed{\text{8.}}\]
\[Нет.\ \ \]
\[x\ :0,1 = 23,5\ \]
\[x = 2,35.\text{\ \ \ }\]