Question

1-0,9•(712-59):0,4= помогите

Answer 1

$1-0,9*( frac{7}{12} - frac{5}{9} ):0,4=1-0,9* frac{21-20}{36} :0,4 =\ =1-0,9* frac{1}{36} :0,4=1- frac{1}{40} :0,4=1- frac{1}{16} = frac{15}{16}$