Решите выражение (в): 3\frac{11}{50} : \frac{2}{5} : (9\frac{3}{4} : 3 - 2\frac{1}{20})

1. (3\frac{11}{50} = \frac{161}{50}\) 2. (9\frac{3}{4} = \frac{39}{4}\) 3. (2\frac{1}{20} = \frac{41}{20}\) 4. \(\frac{39}{4} : 3 = \frac{39}{4} \cdot \frac{1}{3} = \frac{13}{4}\) 5. \(\frac{13}{4} - \frac{41}{20}\) Общий знаменатель 20. \(\frac{13}{4} = \frac{65}{20}\) 6. \(\frac{65}{20} - \frac{41}{20} = \frac{24}{20} = \frac{6}{5}\) 7. \(\frac{161}{50} : \frac{2}{5} = \frac{161}{50} \cdot \frac{5}{2} = \frac{161}{20}\) 8. \(\frac{161}{20} : \frac{6}{5} = \frac{161}{20} \cdot \frac{5}{6} = \frac{161}{24} = 6\frac{17}{24}\) Ответ: (6\frac{17}{24}\)