65. Найдите значение выражения: 1) 8 1/3 · 9 − 2 2/3 · 3 1/4 − 4 4/7 · 3 5/24; 2) 1 1/48 · 2 2/5 − (9 1/6 · 4/15 + 2 5/9) · 1/4.

1. \(8\frac{1}{3}\cdot9-2\frac{2}{3}\cdot3\frac{1}{4}-4\frac{4}{7}\cdot3\frac{5}{24}=\frac{25}{3}\cdot9-\frac{8}{3}\cdot\frac{13}{4}-\frac{32}{7}\cdot\frac{77}{24}=75-\frac{26}{3}-\frac{44}{3}=\frac{155}{3}=51\frac{2}{3}\).
2. \(1\frac{1}{48}\cdot2\frac{2}{5}-\left(9\frac{1}{6}\cdot\frac{4}{15}+2\frac{5}{9}\right)\cdot\frac{1}{4}=\frac{49}{48}\cdot\frac{12}{5}-\left(\frac{55}{6}\cdot\frac{4}{15}+\frac{23}{9}\right)\cdot\frac{1}{4}=\frac{49}{20}-5\cdot\frac{1}{4}=\frac{6}{5}\).

Ответ: 1) \(51\frac{2}{3}\); 2) \(\frac{6}{5}\).