Вычислите:
а) $\frac{72}{56} * \frac{48}{81}$;
б) $\frac{585}{648} * \frac{600}{123}$;
в) $\frac{162}{225} : \frac{273}{675}$;
г) $\frac{960}{540} : \frac{270}{630}$.
$\frac{72}{56} * \frac{48}{81} = \frac{8}{7} * \frac{6}{9} = \frac{8}{7} * \frac{2}{3} = \frac{16}{21}$
$\frac{585}{648} * \frac{600}{123} = \frac{65}{72} * \frac{200}{41} = \frac{65}{9} * \frac{25}{41} = \frac{1625}{369} = 4\frac{149}{369}$
$\frac{162}{225} : \frac{273}{675} = \frac{162}{225} * \frac{675}{273} = \frac{54}{25} * \frac{75}{91} = \frac{54}{1} * \frac{3}{91} = \frac{162}{91} = 1\frac{71}{91}$
$\frac{960}{540} : \frac{270}{630} = \frac{96}{54} * \frac{63}{27} = \frac{32}{6} * \frac{7}{9} = \frac{16}{3} * \frac{7}{9} = \frac{112}{27} = 4\frac{4}{27}$
Пожауйста, оцените решение