Найдите значение выражения:
а) $7\frac{1}{8} : 4\frac{3}{4} * 8$;
б) $11\frac{1}{3} : \frac{4}{21} : 4\frac{1}{4}$;
в) $1\frac{7}{9} * 2\frac{2}{5} : 1\frac{3}{5}$;
г) $\frac{7}{8} * \frac{8}{9} : 1\frac{1}{9}$.
$7\frac{1}{8} : 4\frac{3}{4} * 8 = \frac{57}{8} : \frac{19}{4} * \frac{8}{1} = \frac{57}{8} * \frac{4}{19} * \frac{8}{1} = \frac{3}{1} * \frac{1}{1} * \frac{4}{1} = 3 * 4 = 12$
$11\frac{1}{3} : \frac{4}{21} : 4\frac{1}{4} = \frac{34}{3} * \frac{21}{4} : \frac{17}{4} = \frac{34}{3} * \frac{21}{4} * \frac{4}{17} = \frac{2}{1} * \frac{7}{1} * \frac{1}{1} = 2 * 7 = 14$
$1\frac{7}{9} * 2\frac{2}{5} : 1\frac{3}{5} = \frac{16}{9} * \frac{12}{5} : \frac{8}{5} = \frac{16}{9} * \frac{12}{5} * \frac{5}{8} = \frac{2}{3} * \frac{4}{1} * \frac{1}{1} = \frac{8}{3} = 2\frac{2}{3}$
$\frac{7}{8} * \frac{8}{9} : 1\frac{1}{9} = \frac{7}{8} * \frac{8}{9} : \frac{10}{9} = \frac{7}{8} * \frac{8}{9} * \frac{9}{10} = \frac{7}{1} * \frac{1}{1} * \frac{1}{10} = \frac{7}{10}$.
Пожауйста, оцените решение
