Question

30 : (17 целых 16/19 - 5 целых 16/19) + (7 целых 3/5 - 4 целых 4/5) : 7 =

Answer 1

$30:(17 frac{16}{19} -5frac{16}{19} )+(7frac{3}{5}-4frac{4}{5}):7 \\1);17frac{16}{19} = textgreater frac{339}{19}\\2);5frac{16}{19}= textgreater frac{111}{19}\\3);7frac{3}{5}= textgreater frac{38}{5}\\4);4frac{4}{5}= textgreater frac{24}{5}\\5);7= textgreater frac{1}{7}\\ 30:( frac{339}{19}-frac{111}{19})+(frac{38}{5}-frac{24}{5})*frac{1}{7}\\ 1); frac{339}{19}-frac{111}{19}=12\\2); frac{38}{5}-frac{24}{5}= frac{14}{5}\\30:12+ frac{14}{5}*frac{1}{7}=2,5+ frac{2}{5}= frac{5}{2}+ frac{2}{5} =boxed{2,9}$