Выполните умножение:
1) $\frac{11}{15} * \frac{21}{22} * \frac{9}{28} * \frac{8}{9}$;
2) $2\frac{1}{2} * 3\frac{1}{3} * 4\frac{1}{5} * \frac{8}{35}$;
3) $\frac{3}{8} * 1\frac{5}{7} * \frac{4}{9} * 2\frac{1}{3}$;
4) $1\frac{4}{5} * 1\frac{2}{3} * 2\frac{1}{7} * 4\frac{2}{3}$.
$\frac{11}{15} * \frac{21}{22} * \frac{9}{28} * \frac{8}{9} = \frac{1}{5} * \frac{1}{1} * \frac{1}{1} * \frac{1}{1} = \frac{1}{5}$
$2\frac{1}{2} * 3\frac{1}{3} * 4\frac{1}{5} * \frac{8}{35} = \frac{5}{2} * \frac{10}{3} * \frac{21}{5} * \frac{8}{35} = \frac{1}{1} * \frac{1}{1} * \frac{1}{1} * \frac{8}{1} = 8$
$\frac{3}{8} * 1\frac{5}{7} * \frac{4}{9} * 2\frac{1}{3} = \frac{3}{8} * \frac{12}{7} * \frac{4}{9} * \frac{7}{3} = \frac{1}{1} * \frac{1}{1} * \frac{2}{3} * \frac{1}{1} = \frac{2}{3}$
$1\frac{4}{5} * 1\frac{2}{3} * 2\frac{1}{7} * 4\frac{2}{3} = \frac{9}{5} * \frac{5}{3} * \frac{15}{7} * \frac{14}{3} = \frac{3}{1} * \frac{1}{1} * \frac{5}{1} * \frac{2}{1} = 30$
Пожауйста, оцените решение