а) $\frac{3}{4} - \frac{1}{6}$;
б) $\frac{5}{6} + \frac{4}{9}$;
в) $\frac{4}{45} - \frac{1}{30}$;
г) $\frac{17}{18} - \frac{11}{12}$.
$\frac{3}{4} - \frac{1}{6} = \frac{3 * 3 - 1 * 2}{12} = \frac{9 - 2}{12} = \frac{7}{12}$
$\frac{5}{6} + \frac{4}{9} = \frac{5 * 3 + 4 * 2}{18} = \frac{15 + 8}{18} = \frac{23}{18} = 1\frac{5}{18}$
$\frac{4}{45} - \frac{1}{30} = \frac{4 * 2 - 1 * 3}{90} = \frac{8 - 3}{90} = \frac{5}{90} = \frac{1}{18}$
$\frac{17}{18} - \frac{11}{12} = \frac{17 * 2 - 11 * 3}{36} = \frac{34 - 33}{36} = \frac{1}{36}$
Пожауйста, оцените решение
