Question

7/18×9/14+1/3×6/7 помогите

Answer 1

$frac{7}{18} * frac{9}{14} + frac{1}{3} * frac{6}{7} = frac{7*9}{18*14} + frac{1*6}{3*7} = frac{1}{4} + frac{2}{7} = frac{7}{28} + frac{8}{28} = frac{15}{28}$