Question

Номер 157-158 помогите срочно пожалуйста...

Answer 1

577.
$1) frac{5 times 3}{9 times 10} = frac{1}{3 times 2} = frac{1}{6}$
$2) frac{2 times 3}{8 times 9} = frac{6}{72} = frac{1}{12}$
$3) frac{4 times 7}{21 times 8} = frac{1}{3 times 2} = frac{1}{6}$
$4) frac{6 times 5}{9 times 25} = frac{30}{225} = frac{10}{75} = frac{2}{15}$
158 не знаю