№2. Выполните действия: 1) \frac{8}{29} + \frac{14}{29} - \frac{17}{29}; 2)7 \frac{5}{31} - 4 \frac{2}{31} + 2 \frac{11}{31}; 3) 1 - \frac{18}{27}; 4) 7 \frac{3}{7} - 2 \frac{6}{7}.

№2. Выполните действия:

1) $$ \frac{8}{29} + \frac{14}{29} - \frac{17}{29} = \frac{8 + 14 - 17}{29} = \frac{22 - 17}{29} = \frac{5}{29} $$

2) $$ 7 \frac{5}{31} - 4 \frac{2}{31} + 2 \frac{11}{31} = (7 - 4 + 2) + (\frac{5}{31} - \frac{2}{31} + \frac{11}{31}) = 5 + \frac{5 - 2 + 11}{31} = 5 + \frac{14}{31} = 5 \frac{14}{31} $$

3) $$ 1 - \frac{18}{27} = \frac{27}{27} - \frac{18}{27} = \frac{27 - 18}{27} = \frac{9}{27} = \frac{1}{3} $$

4) $$ 7 \frac{3}{7} - 2 \frac{6}{7} = (7 - 2) + (\frac{3}{7} - \frac{6}{7}) = 5 - \frac{3}{7} = 4 \frac{7}{7} - \frac{3}{7} = 4 \frac{4}{7} $$

Ответ: 1) $$ \frac{5}{29} $$, 2) $$ 5 \frac{14}{31} $$, 3) $$ \frac{1}{3} $$, 4) $$ 4 \frac{4}{7} $$