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