Question

много этажные дроби 1/3-1/5__2/5 =[1/3-1/5]__2/5•15

Answer 1

$frac{ frac{1}{3}- frac{1}{5}}{ frac{2}{5}}- frac{ (frac{1}{3}- frac{1}{5})*15}{ frac{2}{3}*15 }= frac{ frac{2}{15} }{ frac{2}{5} }- frac{ frac{2}{15} }{ frac{2}{3}}= frac{1}{3}- frac{1}{5}= frac{2}{15}$