Выполните умножение.
1) $2\frac{6}{7} * 2\frac{4}{5} = $
2) $2\frac{3}{8} * 1\frac{13}{19} = $
3) $5\frac{1}{16} * 1\frac{11}{45} = $
4) $2\frac{1}{3} * 1\frac{3}{14} = $
$2\frac{6}{7} * 2\frac{4}{5} = \frac{20}{7} * \frac{14}{5} = \frac{20 * 14}{7 * 5} = \frac{4 * 2}{1 * 1} = 8$
$2\frac{3}{8} * 1\frac{13}{19} = \frac{19}{8} * \frac{32}{19} = \frac{19 * 32}{8 * 19} = \frac{1 * 4}{1 * 1} = 4$
$5\frac{1}{16} * 1\frac{11}{45} = \frac{81}{16} * \frac{56}{45} = \frac{81 * 56}{16 * 45} = \frac{9 * 7}{2 * 5} = \frac{63}{10} = 6\frac{3}{10}$
$2\frac{1}{3} * 1\frac{3}{14} = \frac{7}{3} * \frac{17}{14} = \frac{7 * 17}{3 * 14} = \frac{1 * 17}{3 * 2} = \frac{17}{6} = 2\frac{5}{6}$
Пожауйста, оцените решение