Вычислим:
Л) $$4 \frac{3}{8} : \frac{1}{11} = \frac{35}{8} : \frac{1}{11} = \frac{35}{8} * 11 = \frac{385}{8} = 48 \frac{1}{8}$$
Ответ: $$48 \frac{1}{8}$$
T) $$4 \frac{2}{5} : (\frac{7}{10} + 2 \frac{3}{5}) = \frac{22}{5} : (\frac{7}{10} + \frac{13}{5}) = \frac{22}{5} : (\frac{7}{10} + \frac{26}{10}) = \frac{22}{5} : \frac{33}{10} = \frac{22}{5} * \frac{10}{33} = \frac{2 * 2}{3} = \frac{4}{3} = 1 \frac{1}{3}$$
Ответ: $$1 \frac{1}{3}$$
М) $$\frac{3}{4} : \frac{5}{6} + 2 \frac{1}{2} : 1 \frac{2}{5} - 1 : 1 \frac{1}{9} = \frac{3}{4} * \frac{6}{5} + \frac{5}{2} : \frac{7}{5} - 1 : \frac{10}{9} = \frac{18}{20} + \frac{5}{2} * \frac{5}{7} - 1 * \frac{9}{10} = \frac{9}{10} + \frac{25}{14} - \frac{9}{10} = \frac{25}{14} = 1 \frac{11}{14}$$
Ответ: $$1 \frac{11}{14}$$