Вычислите:
а) $\frac{7}{9} - \frac{5}{18}$;
б) $\frac{14}{25} - \frac{1}{5}$;
в) $\frac{7}{10} - \frac{9}{100}$;
г) $\frac{7}{11} - \frac{21}{44}$.
$\frac{7}{9} - \frac{5}{18} = \frac{7^{(2}}{9} - \frac{5}{18} = \frac{14 - 5}{18} = \frac{9}{18} = \frac{1}{2}$
$\frac{14}{25} - \frac{1}{5} = \frac{14}{25} - \frac{1^{(5}}{5} = \frac{14 - 5}{25} = \frac{9}{25}$
$\frac{7}{10} - \frac{9}{100} = \frac{7^{(10}}{10} - \frac{9}{100} = \frac{70 - 9}{100} = \frac{61}{100}$
$\frac{7}{11} - \frac{21}{44} = \frac{7^{(4}}{11} - \frac{21}{44} = \frac{28 - 21}{44} = \frac{7}{44}$
Пожаулйста, оцените решение
