\[\boxed{\mathbf{Проверочная\ работа\ №2.\ Повторение}}\]
\[\boxed{\text{1.}}\]
\[2,8 - 0,03 = 2,77.\ \ \ \]
\[\boxed{\text{2.}}\]
\[3\frac{1}{3} - \frac{2}{3} = 2\frac{4}{3} - \frac{2}{3} = 2\frac{2}{3}\text{.\ \ \ }\]
\[\boxed{\text{3.}}\]
\[46 \cdot 0,001 = 0,046.\ \ \ \]
\[\boxed{\text{4.}}\]
\[4,5 \cdot 0,2 = 0,9.\ \ \ \]
\[\boxed{\text{5.}}\]
\[8\ :40 \cdot 100 = 0,2 \cdot 100 = 20.\]
\[Ответ:20.\ \ \ \]
\[\boxed{\text{6.}}\]
\[V = 1 \cdot 0,2 \cdot 0,3 = 0,06\ \left( м^{3} \right)\text{.\ }\]
\[Ответ:0,06\ м^{3}\text{.\ \ \ }\]
\[\boxed{\text{7.}}\]
\[Да.\ \ \]
\[3,1 < 3,4 < 3,9.\ \ \ \]
\[\boxed{\text{8.}}\]
\[Да.\ \ \]
\[x \cdot 2,5 = 10\ \]
\[x = 4\text{.\ \ }\]