Приведите дроби к наименьшему общему знаменателю:
а)
$\frac{1}{3}$ и $\frac{1}{2}$;
$\frac{3}{8}$ и $\frac{1}{4}$;
$\frac{3}{4}$ и $\frac{5}{6}$.
б)
$\frac{2}{5}$ и $\frac{3}{4}$;
$\frac{8}{9}$ и $\frac{2}{3}$;
$\frac{1}{6}$ и $\frac{5}{9}$.
в)
$\frac{5}{6}$ и $\frac{5}{7}$;
$\frac{7}{15}$ и $\frac{3}{5}$;
$\frac{3}{10}$ и $\frac{8}{15}$.
г)
$\frac{9}{10}$ и $\frac{2}{9}$;
$\frac{5}{18}$ и $\frac{4}{9}$;
$\frac{3}{8}$ и $\frac{5}{12}$.
$\frac{1}{3} = \frac{1 * 2}{3 * 2} = \frac{2}{6}$;
$\frac{1}{2} = \frac{1 * 3}{2 * 3} = \frac{3}{6}$.
$\frac{3}{8}$;
$\frac{1}{4} = \frac{1 * 2}{4 * 2} = \frac{2}{8}$.
$\frac{3}{4} = \frac{3 * 3}{4 * 3} = \frac{9}{12}$;
$\frac{5}{6} = \frac{5 * 2}{6 * 2} = \frac{10}{12}$.
$\frac{2}{5} = \frac{2 * 4}{5 * 4} = \frac{8}{20}$;
$\frac{3}{4} = \frac{3 * 5}{4 * 5} = \frac{15}{20}$.
$\frac{8}{9}$;
$\frac{2}{3} = \frac{2 * 3}{3 * 3} = \frac{6}{9}$.
$\frac{1}{6} = \frac{1 * 3}{6 * 3} = \frac{3}{18}$;
$\frac{5}{9} = \frac{5 * 2}{9 * 2} = \frac{10}{18}$.
$\frac{5}{6} = \frac{5 * 7}{6 * 7} = \frac{35}{42}$;
$\frac{5}{7} = \frac{5 * 6}{7 * 6} = \frac{30}{42}$.
$\frac{7}{15}$;
$\frac{3}{5} = \frac{3 * 3}{5 * 3} = \frac{9}{15}$.
$\frac{3}{10} = \frac{3 * 3}{10 * 3} = \frac{9}{30}$;
$\frac{8}{15} = \frac{8 * 2}{15 * 2} = \frac{16}{30}$.
$\frac{9}{10} = \frac{9 * 9}{10 * 9} = \frac{81}{90}$;
$\frac{2}{9} = \frac{2 * 10}{9 * 10} = \frac{20}{90}$.
$\frac{5}{18}$;
$\frac{4}{9} = \frac{4 * 2}{9 * 2} = \frac{8}{18}$.
$\frac{3}{8} = \frac{3 * 3}{8 * 3} = \frac{9}{24}$;
$\frac{5}{12} = \frac{5 * 2}{12 * 2} = \frac{10}{24}$.
Пожауйста, оцените решение