Question

помогите пожалуйста!!!!!!

Answer 1

$frac{1}{5} + frac{17}{20} = frac{4}{20} + frac{17}{20} = frac{21}{20} = 1frac{1}{20}$

$frac{1}{7} - frac{1}{14} = frac{2}{14} - frac{1}{14} = frac{1}{14}$

$frac{3}{10} + frac{3}{4} = frac{6}{20} + frac{15}{20} = frac{21}{20} = 1 frac{1}{20}$

$frac{28}{57} - frac{3}{19} = frac{28}{57} - frac{9}{57} = frac{19}{57} = frac{1}{3}$

$frac{2}{25} + 0.02 = frac{8}{100} times 0.02 = 0.08 + 0.02 =$
=0,1