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