Question

сделайте пж оч надо​

Answer 1

a)

$frac{5}{12} - frac{1}{3} = frac{5}{12} - frac{1*4}{12} = frac{5-4}{12} = frac{1}{12}$

Проверка:  $frac{1}{12} + frac{1}{3} = frac{1}{12} + frac{1*4}{12} = frac{1+4}{12} = frac{5}{12}$

б)

$frac{1}{5} - frac{3}{20} = frac{1*4}{20} - frac{3}{20} = frac{4-3}{20} = frac{1}{20}$

Проверка:  $frac{1}{20} + frac{3}{20} = frac{4}{20} = frac{1}{5}$

в)

$frac{7}{8} - frac{5}{12} = frac{7*3}{24} - frac{5*2}{24} = frac{21}{24} - frac{10}{24} = frac{11}{24}$

Проверка:  $frac{11}{24} + frac{5}{12} = frac{11}{24} + frac{10}{24} = frac{11+10}{24} = frac{21}{24} = frac{7}{8}$

г)

$frac{9}{10} - frac{1}{6} = frac{9*6}{60} - frac{1*10}{60} = frac{54}{60} - frac{10}{60} = frac{44}{60} = frac{11}{15}$

Проверка:  $frac{11}{15} + frac{1}{6} = frac{11*2}{30} + frac{1*5}{30} = frac{22}{30} + frac{5}{30} = frac{22+5}{30} = frac{27}{30} = frac{9}{10}$