Вычислите произведение и сократить. а)5/12*7/8 б) 6/7*8/9 в) 12/13*2/3 г)4/9*27/16...

Решите задачу:

$\frac{5}{12} * \frac{7}{8} = \frac{35}{96}$

$\frac{6}{7} * \frac{8}{9} = \frac{48}{63} = \frac{16}{21}$

$\frac{12}{13} * \frac{2}{3} = \frac{24}{39} = \frac{8}{13}$

$\frac{4}{9} * \frac{27}{16} = \frac{108}{144} = \frac{3}{4}$

$\frac{4}{25} * \frac{10}{49} = \frac{40}{1225} = \frac{8}{245}$

$\frac{13}{10} * \frac{100}{39} = \frac{1300}{390} = \frac{390 *3+130}{390} = 3 \frac{130}{390} = 3 \frac{1}{3}$