Вычислите: (1/2:3/4-4/9):3/5 1/2:3/8-4/9:3/5 3/5:(9/10-3/5*8/9 3/5:9/10-3/5*8/9

Решите задачу:

$( \frac{1*4}{2*3} - \frac{4}{9} ): \frac{3}{5} = ( \frac{6}{9} - \frac{4}{9} ): \frac{3}{5} = \frac{2*5}{9*3} = \frac{10}{27}$

$\frac{3*10}{5*9} - \frac{3*8}{5*9} = \frac{30-24}{45} = \frac{6}{45} = \frac{2}{15}$

$\frac{3}{5} : ( \frac{9}{10}- \frac{3*8}{5*9} )= \frac{3}{5} :( \frac{27}{30} - \frac{16}{30} )= \frac{3*30}{5*11} = \frac{18}{11} =1 \frac{7}{11}$

$\frac{1*8}{2*3} - \frac{4*5}{9*3} = \frac{36}{27} - \frac{20}{27} = \frac{16}{27}$