Найдите значение числового выражения:
а) $4\frac{1}{3} * (-\frac{8}{13})$;
б) $-\frac{63}{73} * 12\frac{1}{6}$;
в) $20\frac{1}{4} * 20\frac{5}{9}$;
г) $-\frac{8}{11} * (-2\frac{1}{12})$;
д) $5\frac{5}{17} * (-4\frac{8}{15})$;
е) $2\frac{13}{18} * (-3\frac{3}{14})$.
$4\frac{1}{3} * (-\frac{8}{13}) = \frac{13}{3} * (-\frac{8}{13}) = \frac{1}{3} * (-\frac{8}{1}) = -\frac{8}{3} = -2\frac{2}{3}$
$-\frac{63}{73} * 12\frac{1}{6} = -\frac{63}{73} * \frac{73}{6} = -\frac{21}{1} * \frac{1}{2} = -10\frac{1}{2}$
$20\frac{1}{4} * 20\frac{5}{9} = \frac{81}{4} * \frac{185}{9} = \frac{9}{4} * \frac{185}{1} = \frac{1665}{4} = 416\frac{1}{4}$
$-\frac{8}{11} * (-2\frac{1}{12}) = -\frac{8}{11} * (-\frac{25}{12}) = \frac{2}{11} * \frac{25}{3} = \frac{50}{33} = 1\frac{17}{33}$
$5\frac{5}{17} * (-4\frac{8}{15}) = \frac{90}{17} * (-\frac{68}{15}) = \frac{6}{1} * (-\frac{4}{1}) = -24$
$2\frac{13}{18} * (-3\frac{3}{14}) = \frac{49}{18} * (-\frac{45}{14}) = \frac{7}{2} * (-\frac{5}{2}) = -\frac{35}{4} = -8\frac{3}{4}$
Пожауйста, оцените решение