Question

решите
(13 / 30 - 11/45): 1.8/9

Answer 1

=$frac{39-22}{90}$:1$frac{8}{9}$= $frac{17}{90}$:$frac{17}{9}$=$frac{17}{90}$*$frac{9}{17}$=$frac{1}{10}$