Вычислите:
а) $1\frac{1}{3} * 3\frac{1}{4}$;
б) $\frac{3}{4} * 1\frac{1}{3}$;
в) $\frac{2}{11} * 1\frac{5}{6}$;
г) $5\frac{5}{7} * \frac{9}{20}$.
$1\frac{1}{3} * 3\frac{1}{4} = \frac{4}{3} * \frac{13}{4} = \frac{1}{3} * \frac{13}{1} = \frac{13}{3} = 4\frac{1}{3}$
$\frac{3}{4} * 1\frac{1}{3} = \frac{3}{4} * \frac{4}{3} = 1$
$\frac{2}{11} * 1\frac{5}{6} = \frac{2}{11} * \frac{11}{6} = \frac{1}{1} * \frac{1}{3} = \frac{1}{3}$
$5\frac{5}{7} * \frac{9}{20} = \frac{40}{7} * \frac{9}{20} = \frac{2}{7} * \frac{9}{1} = \frac{18}{7} = 2\frac{4}{7}$
Пожаулйста, оцените решение
