Question

12/13*13/12, 4/5*5/8, 9*1/9, 5*2/5, 9/10*100

Answer 1

Ответ:

$\frac{12}{13} * \frac{13}{12} = 1$

$\frac{4}{5} * \frac{5}{8} = \frac{1}{2}$

$9*\frac{1}{9} = 1$

$5*\frac{2}{5} = 2$

$\frac{9}{10} * 100 = 90$