Сравните дроби и запишите результат с помощью знаков >, <, =:
а) $\frac{4}{5}$ и $\frac{7}{10}$;
б) $\frac{5}{12}$ и $\frac{7}{18}$;
в) $\frac{5}{6}$ и $\frac{7}{8}$;
г) $\frac{3}{8}$ и $\frac{5}{16}$;
д) $\frac{9}{8}$ и $1\frac{1}{8}$;
е) $1\frac{7}{20}$ и $\frac{11}{9}$.
$\frac{4}{5} = \frac{4 * 2}{5 * 2} = \frac{8}{10}$;
$\frac{8}{5} > \frac{7}{10}$;
$\frac{8}{10} > \frac{7}{10}$.
$\frac{5}{12} = \frac{5 * 3}{12 * 3} = \frac{15}{36}$;
$\frac{7}{18} = \frac{7 * 2}{18 * 2} = \frac{14}{36}$;
$\frac{15}{36} > \frac{14}{36}$;
$\frac{5}{12} > \frac{7}{18}$.
$\frac{5}{6} = \frac{5 * 4}{6 * 4} = \frac{20}{24}$;
$\frac{7}{8} = \frac{7 * 3}{8 * 3} = \frac{21}{24}$;
$\frac{20}{24} < \frac{21}{24}$;
$\frac{5}{6} < \frac{7}{8}$.
$\frac{3}{8} = \frac{3 * 2}{8 * 2} = \frac{6}{16}$;
$\frac{6}{16} > \frac{5}{16}$;
$\frac{3}{8} > \frac{5}{16}$.
$\frac{9}{8} = 1\frac{1}{8}$
$1\frac{7}{20} = \frac{27}{20} = \frac{27 * 9}{20 * 9} = \frac{243}{180}$;
$\frac{11}{9} = \frac{11 * 20}{9 * 20} = \frac{220}{180}$;
$\frac{243}{180} > \frac{220}{180}$;
$1\frac{7}{20} > \frac{11}{9}$.
Пожауйста, оцените решение