Вычислите произведение:
а) $\frac{1}{3} * 2 = \frac{1}{3} * \frac{2}{1} = \frac{2}{3}$;
б) $\frac{2}{5} * 2$;
в) $\frac{2}{7} * 2$;
г) $\frac{3}{16} * 5$;
д) $\frac{11}{20} * 3$;
е) $\frac{1}{12} * 2$;
ж) $\frac{2}{9} * 3$;
з) $\frac{7}{25} * 5$;
и) $6 * \frac{5}{12}$.
$\frac{1}{3} * 2 = \frac{1}{3} * \frac{2}{1} = \frac{2}{3}$
$\frac{2}{5} * 2 = \frac{2}{5} * \frac{2}{1} = \frac{4}{5}$
$\frac{2}{7} * 2 = \frac{2}{7} * \frac{2}{1} = \frac{4}{7}$
$\frac{3}{16} * 5 = \frac{3}{16} * \frac{5}{1} = \frac{15}{16}$
$\frac{11}{20} * 3 = \frac{11}{20} * \frac{3}{1} = \frac{33}{20}$
$\frac{1}{12} * 2 = \frac{1}{2 * 6} * \frac{2}{1} = \frac{1}{6}$
$\frac{2}{9} * 3 = \frac{2}{3 * 3} * \frac{3}{1} = \frac{2}{3}$
$\frac{7}{25} * 5 = \frac{7}{5 * 5} * \frac{5}{1} = \frac{7}{5}$
$6 * \frac{5}{12} = \frac{6}{1} * \frac{5}{6 * 2} = \frac{5}{2}$
Пожауйста, оцените решение