Сложите дроби.
а) $\frac{2}{17} + \frac{3}{17} + \frac{9}{17} =$
б) $\frac{1}{5} + \frac{3}{5} + \frac{1}{5} =$
в) $\frac{3}{4} + \frac{5}{11} + \frac{6}{11} + \frac{1}{4} =$
г) $\frac{3}{16} + \frac{7}{16} + \frac{5}{16} =$
д) $\frac{7}{10} + \frac{1}{10} + \frac{1}{10} =$
е) $\frac{14}{15} + \frac{3}{2} + \frac{16}{15} + \frac{1}{2} =$

$\frac{2}{17} + \frac{3}{17} + \frac{9}{17} = \frac{5}{17} + \frac{9}{17} = \frac{14}{17}$
$\frac{1}{5} + \frac{3}{5} + \frac{1}{5} = \frac{4}{5} + \frac{1}{5} = \frac{5}{5} =1$
$\frac{3}{4} + \frac{5}{11} + \frac{6}{11} + \frac{1}{4} = (\frac{3}{4} + \frac{1}{4}) + (\frac{5}{11} + \frac{6}{11}) = \frac{4}{4} + \frac{11}{11} = 1 + 1 = 2$
$\frac{3}{16} + \frac{7}{16} + \frac{5}{16} = \frac{10}{16} + \frac{5}{16} = \frac{15}{16}$
$\frac{7}{10} + \frac{1}{10} + \frac{1}{10} = \frac{8}{10} + \frac{1}{10} = \frac{9}{10}$
$\frac{14}{15} + \frac{3}{2} + \frac{16}{15} + \frac{1}{2} = (\frac{14}{15} + \frac{16}{15}) + (\frac{3}{2} + \frac{1}{2}) = \frac{30}{15} + \frac{4}{2} = 2 + 2 = 4$