Question

Помогите пожалуйста номер 395.спасибо.

Answer 1

З95.
а)
$frac{5}{6} - frac{3}{4} = frac{20}{24} - frac{18}{24} = frac{2}{24} = frac{1}{12}$
б)
$frac{1}{3} + frac{1}{5} = frac{5}{15} + frac{3}{15} = frac{8}{15}$
в)
$frac{3}{10} + frac{1}{2} = frac{3}{10} + frac{5}{10} = frac{8}{10} = frac{4}{5} = 0.8$
Г)
$frac{1}{3} - frac{1}{7} = frac{7}{21} - frac{3}{21} = frac{4}{21}$
Д)
$frac{2}{9}$
е)
$frac{9}{20} + frac{3}{8} = frac{18}{40} + frac{15}{40} = frac{33}{40}$
Ж)

$frac{19}{75} - frac{11}{50} = frac{38}{150} - frac{33}{150} = frac{5}{150} = frac{1}{30}$
З)
$frac{13}{50} - frac{17}{75} = frac{39}{150} - frac{34}{150} = frac{5}{150} = frac{1}{30}$
и)
$frac{11}{14} + frac{8}{21} = frac{ 33}{42} + frac{16}{42} = frac{49}{42} = 1 frac{7}{42} \ = 1 frac{1}{6}$
К)
$frac{7}{15}$