Question

125/147*21/50-70/119*17/210-3/14*7/9 помогите решить

Answer 1

$frac{125}{147} times frac{21}{50} = frac{5}{7 times 2} = frac{5}{14}$
$frac{70}{119} times frac{17}{210} = frac{1}{21}$
$frac{3}{14} times frac{7}{9} = frac{1}{6}$
$frac{5}{14} - frac{1}{21} = frac{15}{42} - frac{2}{42} = frac{13}{42}$
$frac{13}{42} - frac{1}{6} = frac{13}{42} - frac{7}{42} = frac{6}{42} = frac{1}{7}$
Ответ:
$frac{1}{7}$