Question

сумма 2/0,9 + 5/1,8 скольки равна ?

Answer 1

$frac{2}{0.9} + frac{5}{1.8} = frac{2*5}{0.9*2} + frac{5}{1.8} = frac{10}{1.8} + frac{5}{1.8} = frac{15}{1.8} = \ = frac{5}{0.6} =5:0.6=5: frac{6}{10} =5: frac{3}{5} =5* frac{5}{3} = frac{5*5}{3} = \ = frac{25}{3} =8 frac{1}{3}$