Блок 2. ФИПИ. Задание 3. Найдите значение выражения: 1) (2 3/17+1/34)·17; 2) (1 1/4−3/19)·19; 3) 4 3/8·(3/8+1 4/13); 4) 5 2/5:(3 1/4−2 4/5).

1. \(\left(2\frac{3}{17}+\frac{1}{34}\right)\cdot17=\left(\frac{75}{34}\right)\cdot17=\frac{75}{2}\).
2. \(\left(1\frac{1}{4}-\frac{3}{19}\right)\cdot19=\left(\frac{5}{4}-\frac{3}{19}\right)\cdot19=\frac{83}{76}\cdot19=\frac{83}{4}\).
3. \(4\frac{3}{8}\cdot\left(\frac{3}{8}+1\frac{4}{13}\right)=\frac{35}{8}\cdot\frac{175}{104}=\frac{6125}{832}\).
4. \(5\frac{2}{5}:\left(3\frac{1}{4}-2\frac{4}{5}\right)=\frac{27}{5}:\frac{9}{20}=12\).

Ответ: 1) \(\frac{75}{2}\); 2) \(\frac{83}{4}\); 3) \(\frac{6125}{832}\); 4) 12.