Найдите произведение:
а) $1\frac{3}{4} * \frac{4}{5}$;
б) $3\frac{1}{3} * 9$;
в) $15 * 2\frac{3}{5}$;
г) $1\frac{3}{7} * 2\frac{4}{5}$;
д) $2\frac{1}{4} * \frac{2}{3}$;
е) $3\frac{3}{4} * \frac{2}{5}$.
$1\frac{3}{4} * \frac{4}{5} = \frac{7}{4} * \frac{4}{5} = \frac{7}{1} * \frac{1}{5} = \frac{7}{5} = 1\frac{2}{5}$
$3\frac{1}{3} * 9 = \frac{10}{3} * 9 = \frac{10}{1} * 3 = 30$
$15 * 2\frac{3}{5} = 15 * \frac{13}{5} = 3 * \frac{13}{1} = 39$
$1\frac{3}{7} * 2\frac{4}{5} = \frac{10}{7} * \frac{14}{5} = \frac{2}{1} * \frac{2}{1} = 4$
$2\frac{1}{4} * \frac{2}{3} = \frac{9}{4} * \frac{2}{3} = \frac{3}{2} * \frac{1}{1} = 1\frac{1}{2}$
$3\frac{3}{4} * \frac{2}{5} = \frac{15}{4} * \frac{2}{5} = \frac{3}{2} * \frac{1}{1} = 1\frac{1}{2}$
Пожауйста, оцените решение