19) $$ \frac{1}{5} $$ + $$ \frac{1}{4} $$ × 1,6 = $$ \frac{1}{5} $$ + $$ \frac{1}{4} $$ × $$ \frac{16}{10} $$ = $$ \frac{1}{5} $$ + $$ \frac{1}{1} $$ × $$ \frac{4}{10} $$ = $$ \frac{1}{5} $$ + $$ \frac{4}{10} $$ = $$ \frac{1}{5} $$ + $$ \frac{2}{5} $$ = $$ \frac{3}{5} $$
Ответ: $$ \frac{3}{5} $$