Question

помогите пожалуйста / 579

Answer 1

$( frac{1}{5} times frac{3}{4} ) times frac{2}{3} = frac{3}{20 } times frac{2}{3} = frac{1}{10} = 0.1$
$frac{2}{9} times ( frac{3}{10} times frac{7}{8} ) = frac{2}{9} times frac{21}{80} = frac{21}{360} = frac{7}{120}$
$( frac{15}{19} times frac{7}{9} ) times frac{5}{7} = frac{105}{171} times frac{5}{7} = frac{525}{1197} = frac{175}{399} = frac{25}{57}$
$( frac{10}{13} times frac{11}{12} ) times ( frac{12}{55} times frac{13}{20} ) = frac{55}{78} times frac{78}{550} = frac{1}{ 10} = 0.1$