Задание 1:
\( \frac{1}{3} : 27 = \frac{1}{3} \times \frac{1}{27} = \frac{1}{81} \)
Задание 2:
\( \frac{3}{4} - 2 = \frac{3}{4} - \frac{8}{4} = \frac{3-8}{4} = -\frac{5}{4} \)
Задание 3:
\( 5\left( 4\frac{3}{4} - 2 \right) : \frac{33}{2} + \frac{46}{11} : \frac{47}{18} \)
\( 4\frac{3}{4} - 2 = \frac{19}{4} - \frac{8}{4} = \frac{11}{4} \)
\( 5 \times \frac{11}{4} = \frac{55}{4} \)
\( \frac{55}{4} : \frac{33}{2} = \frac{55}{4} \times \frac{2}{33} = \frac{5 \times 11 \times 2}{2 \times 2 \times 3 \times 11} = \frac{5}{6} \)
\( \frac{46}{11} : \frac{47}{18} = \frac{46}{11} \times \frac{18}{47} = \frac{828}{517} \)
\( \frac{5}{6} + \frac{828}{517} \)
Приведем к общему знаменателю. \( 6 = 2 \times 3 \), \( 517 = 11 \times 47 \). Общий знаменатель: \( 6 \times 517 = 3102 \).
\( \frac{5 \times 517}{6 \times 517} + \frac{828 \times 6}{517 \times 6} = \frac{2585}{3102} + \frac{4968}{3102} = \frac{2585 + 4968}{3102} = \frac{7553}{3102} \)
Ответ: 7553/3102.