Сложите дроби:
а) $\frac{1}{2} + \frac{1}{3}$;
б) $\frac{1}{2} + \frac{1}{5}$;
в) $\frac{1}{3} + \frac{1}{4}$;
г) $\frac{1}{4} + \frac{1}{5}$;
д) $\frac{1}{2} + \frac{1}{4}$;
е) $\frac{1}{3} + \frac{1}{6}$;
ж) $\frac{1}{2} + \frac{1}{6}$;
з) $\frac{1}{4} + \frac{1}{8}$.
$\frac{1}{2} + \frac{1}{3} = \frac{1 * 3 + 1 * 2}{2 * 3} = \frac{3 + 2}{6} = \frac{5}{6}$
$\frac{1}{2} + \frac{1}{5} = \frac{1 * 5 + 1 * 2}{2 * 5} = \frac{5 + 2}{10} = \frac{7}{10}$
$\frac{1}{3} + \frac{1}{4} = \frac{1 * 4 + 1 * 3}{3 * 4} = \frac{4 + 3}{12} = \frac{7}{12}$
$\frac{1}{4} + \frac{1}{5} = \frac{1 * 5 + 1 * 4}{4 * 5} = \frac{5 + 4}{20} = \frac{9}{20}$
$\frac{1}{2} + \frac{1}{4} = \frac{1 * 2 + 1}{2 * 2} = \frac{2 + 1}{4} = \frac{3}{4}$
$\frac{1}{3} + \frac{1}{6} = \frac{1 * 2 + 1}{2 * 3} = \frac{2 + 1}{6} = \frac{3}{6} = \frac{1 * 3}{2 * 3} = \frac{1}{2}$
$\frac{1}{2} + \frac{1}{6} = \frac{1 * 3 + 1}{2 * 3} = \frac{3 + 1}{6} = \frac{4}{6} = \frac{2 * 2}{3 * 2} = \frac{2}{3}$
$\frac{1}{4} + \frac{1}{8} = \frac{1 * 2 + 1}{4 * 2} = \frac{2 + 1}{8} = \frac{3}{8}$
Пожауйста, оцените решение