Решебник по алгебре 8 класс Мерзляк Задание 66

\[\boxed{\text{66}\text{\ (66)}\text{.\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]

\[1)\ \frac{7}{18} + \frac{5}{18} = \frac{12}{18} = \frac{2}{3}\]

\[2)\ \frac{9}{16} + \frac{7}{16} = \frac{16}{16} = 1\]

\[3)\ \frac{23}{32} - \frac{15}{32} = \frac{8}{32} = \frac{1}{4}\ \]

\[4)\ 4 - 1\frac{3}{11} = 4 - \frac{14}{11} =\]

\[= \frac{4 \cdot 11 - 14}{11} = \frac{44 - 14}{11} =\]

\[= \frac{30}{11} = 2\frac{8}{11}\]