\[\boxed{\mathbf{Проверочная\ работа\ №2.\ Вычитание}}\]
\[\boxed{\text{1.}}\]
\[\textbf{а)} - 26 - 46 = - 72\]
\[\textbf{б)} - 96,2 + ( - 10,8) = - 106,8\]
\[\textbf{в)} - 2\frac{1}{3} - \left( - 3\frac{3}{8} \right) =\]
\[= - 2\frac{1}{3} + 3\frac{3}{8} = 3\frac{9}{24} - 2\frac{8}{24} =\]
\[= 1\frac{1}{24}\]
\[\boxed{\text{2.}}\]
\[k = - 4,5:\]
\[- k - 2,8 - 1,7 = - k - 4,5 =\]
\[= - ( - 4,5) - 4,5 = 4,5 - 4,5 =\]
\[= 0.\]
\[\boxed{\text{3.}}\]
\[\textbf{а)}\ \left| \text{AB} \right| = \left| - 1 - ( - 4) \right| = |3| = 3.\]
\[\textbf{б)}\ \left| \text{CK} \right| = \left| 6,6 - ( - 5,4) \right| =\]
\[= |12| = 12.\]
\[\textbf{в)}\ \left| \text{QP} \right| = \left| 1\frac{1}{7} - \left( - 4\frac{3}{7} \right) \right| =\]
\[= \left| 5\frac{4}{7} \right| = 5\frac{4}{7}.\]
\[\boxed{\text{4.}}\]
\[\textbf{а)} - 23 - 17 + 10 =\]
\[= - 40 + 10 = - 30\]
\[\textbf{б)} - 4\frac{1}{30} + \frac{1}{6} - 0,6 =\]
\[= - \left( 4\frac{1}{30} + \frac{3}{5} \right) + \frac{1}{6} =\]
\[= - \left( 4\frac{1}{30} + \frac{18}{30} \right) + \frac{1}{6} =\]
\[= - 4\frac{19}{30} + \frac{5}{30} = - 4\frac{14}{30} = - 4\frac{7}{15}\ \]
\[\boxed{\text{5.}}\]
\[Да.\]
\[Числа\ ( - 5)\ и\ ( - 15):\]
\[- 5 - ( - 15) = - 5 + 15 = 10;\]
\[- 5 + ( - 15) = - 20;\]
\[10 > - 20.\]
Глава 33. Действие умножения