2. Вычисли: 1) 5/8 + 2/8; 2) 5/8 - 2/8; 3) 2 2/4 + 4; 4) 6 - 1 7/11; 5) 8 3/7 - 6 2/7; 6) 4 : 13; 7) 13 : 4; 8) 5/10 + 7/10; 9) 10 4/9 - 5 6/9.

1) \(\frac{5}{8} + \frac{2}{8} = \frac{5+2}{8} = \frac{7}{8}\) 2) \(\frac{5}{8} - \frac{2}{8} = \frac{5-2}{8} = \frac{3}{8}\) 3) \(2 \frac{2}{4} + 4 = 2 + \frac{2}{4} + 4 = 6 + \frac{2}{4} = 6 \frac{1}{2}\) 4) \(6 - 1 \frac{7}{11} = 6 - \frac{18}{11} = \frac{66}{11} - \frac{18}{11} = \frac{48}{11} = 4 \frac{4}{11}\) 5) \(8 \frac{3}{7} - 6 \frac{2}{7} = (8-6) + (\frac{3}{7} - \frac{2}{7}) = 2 + \frac{1}{7} = 2 \frac{1}{7}\) 6) \(4 : 13 = \frac{4}{13}\) 7) \(13 : 4 = \frac{13}{4} = 3 \frac{1}{4}\) 8) \(\frac{5}{10} + \frac{7}{10} = \frac{5+7}{10} = \frac{12}{10} = \frac{6}{5} = 1 \frac{1}{5}\) 9) \(10 \frac{4}{9} - 5 \frac{6}{9} = \frac{94}{9} - \frac{51}{9} = \frac{49}{9} - \frac{51}{9} = 4 \frac{8}{9}\)