Вариант 1. Задание 6. Выполните действия: 1) $$4 : 4\frac{4}{5} + 2\frac{2}{7} \cdot 5\frac{1}{4} - 7\frac{11}{12}$$.

1) $$4 : 4\frac{4}{5} + 2\frac{2}{7} \cdot 5\frac{1}{4} - 7\frac{11}{12} = 4 : \frac{24}{5} + \frac{16}{7} \cdot \frac{21}{4} - \frac{95}{12} = 4 \cdot \frac{5}{24} + \frac{16 \cdot 21}{7 \cdot 4} - \frac{95}{12} = \frac{20}{24} + \frac{4 \cdot 3}{1 \cdot 1} - \frac{95}{12} = \frac{5}{6} + 12 - \frac{95}{12} = \frac{10}{12} + \frac{144}{12} - \frac{95}{12} = \frac{10 + 144 - 95}{12} = \frac{59}{12} = 4\frac{11}{12}$$.