\[\boxed{\text{Проверьте\ себя}\text{.\ Страницы\ 52-53}}\]
\[\boxed{\text{Проверочная\ работа}\text{.\ Сложение\ и\ вычитание\ смешанных\ чисел}}\]
\[\boxed{\text{1.}}\]
\[\frac{5}{9} + 3\frac{2}{9} = 3\frac{7}{9}\text{.\ \ \ }\]
\[\boxed{\text{2.}}\]
\[\frac{9}{13} + 6\frac{4}{13} = 6\frac{13}{13} = 6 + \frac{13}{13} =\]
\[= 6 + 1 = 7.\ \ \ \]
\[\boxed{\text{3.}}\]
\[1 - \frac{9}{11} = \frac{11}{11} - \frac{9}{11} = \frac{2}{11}\text{.\ \ \ }\]
\[\boxed{\text{4.}}\]
\[7\frac{3}{5} + 3 = 10\frac{3}{5}\text{.\ \ \ }\]
\[\boxed{\text{5.}}\]
\[1\frac{1}{4} + \frac{3}{4} = 1\frac{4}{4} = 2.\ \ \ \]
\[\boxed{\text{6.}}\]
\[6 - знаменатель;\ \]
\[4 - целая\ часть;\ \]
\[\ 5 - числитель.\]
\[Число:\ \ 4\frac{5}{6}\text{.\ \ \ \ }\]
\[\boxed{\text{7.}}\]
\[Нет.\]
\[y + 3\frac{7}{15} = 5\]
\[y = 5 - 3\frac{7}{15}\]
\[y = 4\frac{15}{15} - 3\frac{7}{15}\]
\[y = 1\frac{8}{15}\text{.\ \ \ }\]
\[\boxed{\text{8.}}\]
\[Да.\]