Вычислите:
а) $\frac{11}{16} - \frac{3}{8}$;
б) $\frac{5}{6} - \frac{5}{12}$;
в) $\frac{4}{7} - \frac{8}{21}$;
г) $\frac{17}{30} - \frac{4}{15}$.
$\frac{11}{16} - \frac{3}{8} = \frac{11}{16} - \frac{3^{(2}}{8} = \frac{11 - 6}{16} = \frac{5}{16}$
$\frac{5}{6} - \frac{5}{12} = \frac{5^{(2}}{6} - \frac{5}{12} = \frac{10 - 5}{12} = \frac{5}{12}$
$\frac{4}{7} - \frac{8}{21} = \frac{4^{(3}}{7} - \frac{8}{21} = \frac{12 - 8}{21} = \frac{3}{21} = \frac{1}{7}$
$\frac{17}{30} - \frac{4}{15} = \frac{17}{30} - \frac{4^{(2}}{15} = \frac{17 - 8}{30} = \frac{9}{30} = \frac{3}{10}$
Пожауйста, оцените решение
