Найдите значение выражения:
а) $2\frac{3}{4} : (1\frac{1}{2} - \frac{2}{5}) + (\frac{3}{4} + \frac{5}{6}) : 3\frac{1}{6}$;
б) $15\frac{4}{7} - 4\frac{3}{8} * (1\frac{3}{7} - \frac{34}{35})$.
$2\frac{3}{4} : (1\frac{1}{2} - \frac{2}{5}) + (\frac{3}{4} + \frac{5}{6}) : 3\frac{1}{6} = 2\frac{3}{4} : (1\frac{5}{10} - \frac{4}{10}) + (\frac{9}{12} + \frac{10}{12}) : \frac{19}{6} = 2\frac{3}{4} : 1\frac{1}{10} + \frac{19}{12} : \frac{19}{6} = \frac{11}{4} : \frac{11}{10} + \frac{19}{12} * \frac{6}{19} = \frac{11}{4} * \frac{10}{11} + \frac{1}{2} * \frac{1}{1} = \frac{11}{4} * \frac{10}{11} + \frac{1}{2} = \frac{1}{2} * \frac{5}{1} + \frac{1}{2} = \frac{5}{2} + \frac{1}{2} = \frac{6}{2} = 3$
$15\frac{4}{7} - 4\frac{3}{8} * (1\frac{3}{7} - \frac{34}{35}) = 15\frac{4}{7} - 4\frac{3}{8} * (1\frac{15}{35} - \frac{34}{35}) = 15\frac{4}{7} - \frac{35}{8} * (\frac{50}{35} - \frac{34}{35}) = 15\frac{4}{7} - \frac{35}{8} * \frac{16}{35} = 15\frac{4}{7} - \frac{1}{1} * \frac{2}{1} = 15\frac{4}{7} - 2 = 13\frac{4}{7}$
Пожауйста, оцените решение
