Выполните действия: 1) \(\frac{19}{28} + \frac{16}{28} - \frac{17}{28}\); 2) \(4\frac{11}{14} - 2\frac{5}{14} + 1\frac{3}{14}\); 3) \(1 - \frac{8}{17}\); 4) \(4\frac{5}{9} - 2\frac{8}{9}\).

1) \(\frac{19}{28} + \frac{16}{28} - \frac{17}{28} = \frac{19 + 16 - 17}{28} = \frac{35 - 17}{28} = \frac{18}{28} = \frac{9}{14}\) Ответ: \(\frac{9}{14}\) 2) \(4\frac{11}{14} - 2\frac{5}{14} + 1\frac{3}{14} = (4 - 2 + 1) + (\frac{11}{14} - \frac{5}{14} + \frac{3}{14}) = 3 + \frac{11 - 5 + 3}{14} = 3 + \frac{9}{14} = 3\frac{9}{14}\) Ответ: \(3\frac{9}{14}\) 3) \(1 - \frac{8}{17} = \frac{17}{17} - \frac{8}{17} = \frac{17 - 8}{17} = \frac{9}{17}\) Ответ: \(\frac{9}{17}\) 4) \(4\frac{5}{9} - 2\frac{8}{9} = 3\frac{14}{9} - 2\frac{8}{9} = (3 - 2) + (\frac{14}{9} - \frac{8}{9}) = 1 + \frac{6}{9} = 1\frac{2}{3}\) Ответ: \(1\frac{2}{3}\)