Найдите значение выражения:
1) $(2\frac{13}{48} + 2\frac{5}{12}) : 3\frac{3}{4} - 9\frac{3}{4} : 12$;
2) $(8 : 2\frac{10}{19} - 1\frac{13}{15} * 1\frac{6}{49}) : (3\frac{1}{12} - 1\frac{25}{36})$.
$(2\frac{13}{48} + 2\frac{5}{12}) : 3\frac{3}{4} - 9\frac{3}{4} : 12 = 4\frac{33}{48} * \frac{4}{15} - \frac{39}{4} * \frac{1}{12} = 4\frac{11}{16} * \frac{4}{5} - \frac{3}{4} * \frac{1}{4} = \frac{75}{16} * \frac{4}{15} - \frac{3}{4} * \frac{1}{4} = \frac{5}{4} * \frac{1}{1} - \frac{3}{4} * \frac{1}{4} = \frac{5}{4} - \frac{3}{16} = \frac{20}{16} - \frac{3}{16} = \frac{17}{16} = 1\frac{1}{16}$
$(8 : 2\frac{10}{19} - 1\frac{13}{15} * 1\frac{6}{49}) : (3\frac{1}{12} - 1\frac{25}{36}) = (8 * \frac{19}{48} - \frac{28}{15} * \frac{55}{49}) : (2\frac{39}{36} - 1\frac{25}{36}) = (1 * \frac{19}{6} - \frac{4}{3} * \frac{11}{7}) : 1\frac{14}{36} = (\frac{19}{6} - \frac{44}{21}) : 1\frac{7}{18} = (\frac{133}{42} - \frac{88}{42}) : \frac{18}{25} = \frac{45}{42} * \frac{18}{25} = \frac{9}{7} * \frac{3}{5} = \frac{27}{35}$
Пожауйста, оцените решение
