Выполните действия.
а) $4\frac{3}{10} + 2\frac{7}{10} + 3\frac{9}{10} =$
б) $30\frac{1}{6} - \frac{2}{6} - \frac{4}{6} =$
в) $(7\frac{2}{5} + \frac{3}{5}) * 100 =$
г) $(18\frac{4}{9} - \frac{4}{9}) : 6 =$

$4\frac{3}{10} + 2\frac{7}{10} + 3\frac{9}{10} = 6\frac{10}{10} + 3\frac{9}{10} = 7 + 3\frac{9}{10} = 10\frac{9}{10}$
$30\frac{1}{6} - \frac{2}{6} - \frac{4}{6} = 29\frac{7}{6} - \frac{2}{6} - \frac{4}{6} = 29\frac{5}{6} - \frac{4}{6} = 29\frac{1}{6}$
$(7\frac{2}{5} + \frac{3}{5}) * 100 = 7\frac{5}{5} * 100 = 8 * 100 = 8$
$(18\frac{4}{9} - \frac{4}{9}) : 6 = 18 : 6 = 3$