\[\boxed{\mathbf{Проверьте\ себя.\ Страница\ 61}}\]
\[\boxed{\mathbf{Проверочная\ работа.\ Деление}}\]
\[\boxed{\text{1.}}\]
\[\textbf{а)}\ 48\ :( - 3) = - 16\]
\[\textbf{б)}\ \left( - \frac{5}{6} \right)\ :\frac{3}{4} = - \frac{5}{6} \cdot \frac{4}{3} =\]
\[= - \frac{10}{9} = - 1\frac{1}{9}\]
\[\textbf{в)}\ |0,39|\ :| - 1,3| = 0,39\ :1,3 =\]
\[= 3,9\ :13 = 0,3\]
\[\textbf{г)}\ 0\ :( - 19) = 0\]
\[\boxed{\text{2.}}\]
\[\textbf{а)}\ (3 - 13)\ :( - 17 + 7) =\]
\[= - 10\ :( - 10) = 1\]
\[\textbf{б)}\ ( - 1,2 - 1,2)\ :( - 1 - 2) =\]
\[= - 2,4\ :( - 3) = 0,8\]
\[\textbf{в)}\ \left( \frac{1}{4} - \frac{1}{2} - \frac{3}{4} \right)\ :\left( - 2\frac{17}{18} + 3\frac{17}{18} \right) =\]
\[= \left( - \frac{2}{4} - \frac{1}{2} \right)\ :1 = \left( - \frac{1}{2} - \frac{1}{2} \right)\ :1 =\]
\[= - 1\ :1 = - 1\]
\[\boxed{\text{3.}}\]
\[\textbf{а)}\ x\ :8 = - 4\frac{1}{8}\]
\[x = - \frac{33}{8} \cdot 8\]
\[x = - 33.\]
\[\textbf{б)}\ x\ :( - 2,4) = - 3,5\ :4\]
\[x\ :( - 2,4) = - \frac{35}{40}\]
\[x\ :\left( - \frac{24}{10} \right) = - \frac{7}{8}\]
\[x = - \frac{7}{8} \cdot \left( - \frac{12}{5} \right)\]
\[x = \frac{21}{10} = 2,1.\]
\[\boxed{\text{4.}}\]
\[\textbf{а)}\ ( - 4)\ :( - 7)\ :\frac{1}{2}\ :\left( - \frac{4}{5} \right)\ :( - 6) =\]
\[= \frac{4}{7} \cdot 2 \cdot \frac{5}{4} \cdot \frac{1}{6} = \frac{5}{21}\]
\[\textbf{б)} - 6\ :2 \cdot ( - 0,4)\ :\left( - 1\frac{1}{4} \right) \cdot 4 =\]
\[= - 3 \cdot ( - 0,4)\ :\left( - \frac{5}{4} \right) \cdot 4 =\]
\[= 1,2 \cdot \left( - \frac{4}{5} \right) \cdot 4 =\]
\[= - \frac{6}{5} \cdot \frac{4}{5} \cdot 4 = - \frac{96}{25} = - 3\frac{21}{25}\]
Глава 35. Рациональные числа