Question

15 : (3/12/17 + 2/5/17) + (4/1/5 - 2/3/5) : 4 Решите.

Answer 1

$15 div ( 3frac{12}{17} + 2 frac{5}{17} ) + (4 frac{1}{5} - 2 frac{3}{5} )div 4 = 15 div 5 frac{17}{17} + 1frac{3}{5} div 4 = frac{15}{1} div frac{6}{1} + frac{8}{5} div frac{4}{1} = frac{15}{1} times frac{1}{6} + frac{8}{5} times frac{1}{4} = frac{5}{2} + frac{2}{5} = frac{25 + 4}{10} = frac{29}{10} = 2 frac{9}{10}$