\[\boxed{\mathbf{Проверьте\ себя.\ Страницы\ 153 - 155}}\]
\[\boxed{\mathbf{Проверочная\ работа\ №1.\ Повторение}}\]
\[\boxed{\text{1.}}\]
\[2,5 + 0,06 = 2,56.\ \ \ \]
\[\boxed{\text{2.}}\]
\[5\frac{1}{4} + 1\frac{3}{4} = 7.\ \ \ \]
\[\boxed{\text{3.}}\]
\[1,2\ :0,3 = 12\ :3 = 4.\ \ \ \]
\[\boxed{\text{4.}}\]
\[0,001\ :0,1 = 0,01.\ \ \ \]
\[\boxed{\text{5.}}\]
\[4 \cdot 3,4 = 13,6\ (м) - периметр\ \]
\[квадрата.\ \]
\[Ответ:13,6\ м.\ \ \ \]
\[\boxed{\text{6.}}\]
\[8,57 \approx 8,6.\ \ \ \]
\[\boxed{\text{7.}}\]
\[Да.\ \ \]
\[x\ :2,5 = 10\ \]
\[\ x = 25.\ \ \ \]
\[\boxed{\text{8.}}\]
\[Нет.\]
\[10\ :5 \cdot 100 = 200.\ \ \ \]