Вычислите:
а) $\frac{1}{8} - \frac{1}{10} + \frac{1}{4}$;
б) $\frac{3}{20} + \frac{1}{5} - \frac{1}{6}$;
в) $\frac{3}{4} - \frac{4}{25} - \frac{7}{20}$;
г) $\frac{3}{7} - \frac{1}{6} + \frac{5}{14}$.
$\frac{1}{8} - \frac{1}{10} + \frac{1}{4} = \frac{5}{40} - \frac{4}{40} + \frac{10}{40} = \frac{1}{40} + \frac{10}{40} = \frac{11}{40}$
$\frac{3}{20} + \frac{1}{5} - \frac{1}{6} = \frac{9}{60} + \frac{12}{60} - \frac{10}{60} = \frac{21}{60} - \frac{10}{60} = \frac{11}{60}$
$\frac{3}{4} - \frac{4}{25} - \frac{7}{20} = \frac{75}{100} - \frac{16}{100} - \frac{35}{100} = \frac{40}{100} - \frac{16}{100} = \frac{24}{40} = \frac{3}{5}$
$\frac{3}{7} - \frac{1}{6} + \frac{5}{14} = \frac{18}{42} - \frac{7}{42} + \frac{15}{42} + \frac{15}{42} = \frac{11}{42} + \frac{15}{42} = \frac{16}{42} = \frac{8}{21}$
Пожауйста, оцените решение