Question

426. Найдите значения выражения 1/5 - 1/6
7/9 - 1/11
7/8 - 5/12​

Answer 1

Находим НОЗ:

$\frac{1}{5} - \frac{1}{6} = \frac{6}{30} - \frac{5}{30} = \frac{1}{30}$

$\frac{7}{9} - \frac{1}{11} = \frac{77}{99} - \frac{9}{99} = \frac{68}{99}$

$\frac{7}{8} - \frac{5}{12} = \frac{21}{24} - \frac{10}{24} = \frac{11}{24}$