Вычислите:
а) $-\frac{4}{9} : \frac{3}{7} * (-\frac{5}{12})$;
б) $-\frac{4}{17} * (-\frac{2}{3}) * (-\frac{17}{4})$;
в) $-\frac{1}{17} : \frac{17}{30} * (-\frac{5}{22})$.
$-\frac{4}{9} : \frac{3}{7} * (-\frac{5}{12}) = \frac{4}{9} * \frac{7}{3} * \frac{5}{12} = \frac{1}{9} * \frac{7}{3} * \frac{5}{3} = \frac{7}{27} * \frac{5}{3} = \frac{35}{81}$
$-\frac{4}{17} * (-\frac{2}{3}) * (-\frac{17}{4}) = -\frac{1}{1} * (-\frac{2}{3}) * (-\frac{1}{1}) = -\frac{2}{3}$
$-\frac{1}{17} : \frac{17}{30} * (-\frac{5}{22}) = \frac{1}{17} * \frac{30}{17} * \frac{5}{22} = \frac{1}{17} * \frac{15}{17} * \frac{5}{11} = \frac{75}{3179}$
Пожауйста, оцените решение
