Выполните действия:
а) $-3\frac{1}{5} * (-\frac{1}{4})^2$;
б) $-8\frac{2}{3} * (-\frac{1}{26}) : (-\frac{7}{9})^2$;
в) $(1\frac{1}{7})^2 : 1\frac{19}{21} * (-\frac{5}{6})$;
г) $(-\frac{2}{3})^3 * (-2\frac{17}{32}) : \frac{9}{16}$.
$-3\frac{1}{5} * (-\frac{1}{4})^2 = -\frac{16}{5} * \frac{1}{16} = -\frac{1}{5}$
$-8\frac{2}{3} * (-\frac{1}{26}) : (-\frac{7}{9})^2 = -\frac{26}{3} * (-\frac{1}{26}) * \frac{81}{49} = -\frac{1}{3} * (-\frac{1}{1}) * \frac{81}{49} = \frac{1}{1} * \frac{27}{49} = \frac{27}{49}$
$(1\frac{1}{7})^2 : 1\frac{19}{21} * (-\frac{5}{6}) = (\frac{8}{7})^2 : \frac{40}{21} * (-\frac{5}{6}) = \frac{64}{49} * \frac{21}{40} * (-\frac{5}{6}) = \frac{8}{7} * \frac{3}{5} * (-\frac{5}{6}) = \frac{8}{7} * \frac{1}{1} * (-\frac{1}{2}) = -\frac{4}{7}$
$(-\frac{2}{3})^3 * (-2\frac{17}{32}) : \frac{9}{16} = (-\frac{8}{27}) * (-\frac{81}{32}) * \frac{16}{9} = (-\frac{1}{1}) * (-\frac{3}{4}) * \frac{16}{9} = \frac{1}{1} * \frac{4}{3} = 1\frac{1}{3}$
Пожауйста, оцените решение
