Question

Помогите 1/4+2,7 4,1*2/5. 2,9-1целую 3/4. Даю 100 балов

Answer 1

$frac{1}{4} + 2,7 = frac{1}{4} + 2 frac{7}{10} = frac{5}{20} + 2 frac{14}{20} = 2 frac{19}{20} = 2,95$

$4,1*frac{2}{5} = 4 frac{1}{10} * frac{2}{5} = frac{41}{10} * frac{2}{5} = frac{41*2}{10*5} = frac{82}{50} = frac{41}{25} = 1 frac{16}{25} = 1,64$

$2,9 - 1frac{3}{4} = 2frac{9}{10} - 1frac{3}{4} = 2frac{18}{20} - 1frac{15}{20} = 1 frac{3}{20} = 1,15$