19. (4 1/3 − 1 3/4) : 1 1/24 + (2 1/2 + 1 1/6) · 9/22

\(4\frac13-1\frac34=\frac{31}{12}\), поэтому \(\frac{31}{12}:1\frac1{24}=\frac{31}{12}\cdot\frac{24}{25}=\frac{62}{25}\).

\(2\frac12+1\frac16=\frac{11}{3}\), поэтому \(\frac{11}{3}\cdot\frac9{22}=\frac32\).

\(\frac{62}{25}+\frac32=\frac{124}{50}+\frac{75}{50}=\frac{199}{50}=3\frac{49}{50}\).

Ответ: \(3\frac{49}{50}\).