Question

(34+15)*519 вычислить

Answer 1

(3/4+1/5)*5/19=(15/20+4/20)*5/19=19/20*5/19=5/20=1/4

Answer 2

$( frac{3}{4} +frac{1}{5} )*frac{5}{19} =frac{3*5+1*4}{20} *frac{5}{19} =frac{15+4}{20} *frac{5}{19} =frac{19}{20} *frac{5}{19}=frac{1}{4}$