Выполните вычитание:
а) $2\frac{1}{3} - 1\frac{1}{2}$;
б) $4\frac{1}{5} - 2\frac{3}{10}$;
в) $7\frac{1}{9} - 4\frac{1}{3}$;
г) $2\frac{2}{7} - 1\frac{3}{5}$;
д) $6\frac{1}{4} - 3\frac{2}{5}$.
$2\frac{1}{3} - 1\frac{1}{2} = 2\frac{2}{6} - 1\frac{3}{6} = 1\frac{2}{6} - \frac{3}{6} = \frac{8}{6} - \frac{3}{6} = \frac{5}{6}$
$4\frac{1}{5} - 2\frac{3}{10} = 4\frac{2}{10} - 2\frac{3}{10} = 2\frac{2}{10} - \frac{3}{10} = 1 + \frac{12}{10} - \frac{3}{10} = 1 + \frac{9}{10} = 1\frac{9}{10}$
$7\frac{1}{9} - 4\frac{1}{3} = 7\frac{1}{9} - 4\frac{3}{9} = 3\frac{1}{9} - \frac{3}{9} = 2 + \frac{10}{9} - \frac{3}{9} = 2 + \frac{7}{9} = 2\frac{7}{9}$
$2\frac{2}{7} - 1\frac{3}{5} = 2\frac{10}{35} - 1\frac{21}{35} = 1\frac{10}{35} - \frac{21}{35} = \frac{45}{35} - \frac{21}{35} = \frac{24}{35}$
$6\frac{1}{4} - 3\frac{2}{5} = 6\frac{5}{20} - 3\frac{8}{20} = 3\frac{5}{20} - \frac{8}{20} = 2 + \frac{25}{20} - \frac{8}{20} = 2 + \frac{17}{20} = 2\frac{17}{20}$