Упростите выражение.
1) $\frac{8}{25}a * \frac{5}{56}b = (\frac{8}{25} * \frac{5}{56})ab =$
2) $4\frac{4}{9}m * 2\frac{5}{8}n =$
3) $5\frac{1}{3}x * 9y =$
$\frac{8}{25}a * \frac{5}{56}b = (\frac{8}{25} * \frac{5}{56})ab = (\frac{1}{5} * \frac{1}{7})ab = \frac{1}{35}ab$
$4\frac{4}{9}m * 2\frac{5}{8}n = (4\frac{4}{9} * 2\frac{5}{8})mn = (\frac{40}{9} * \frac{21}{8})mn = (\frac{5}{3} * \frac{7}{1})mn = \frac{35}{3}mn = 11\frac{2}{3}mn$
$5\frac{1}{3}x * 9y = (5\frac{1}{3} * 9)xy = (\frac{16}{3} * 9)xy = (\frac{16}{1} * 3)xy = 48xy$
Пожауйста, оцените решение
