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) \(4\frac{5}{9} - 2\frac{8}{9}\)

Решение:

1. \(\frac{19}{28} + \frac{16}{28} - \frac{17}{28} = \frac{19 + 16 - 17}{28} = \frac{18}{28} = \frac{9}{14}\)
2. \(4\frac{11}{14} - 2\frac{5}{14} + 1\frac{3}{14} = (4 - 2 + 1) + (\frac{11}{14} - \frac{5}{14} + \frac{3}{14}) = 3 + \frac{11 - 5 + 3}{14} = 3 + \frac{9}{14} = 3\frac{9}{14}\)
3. \(1 - \frac{8}{17} = \frac{17}{17} - \frac{8}{17} = \frac{17 - 8}{17} = \frac{9}{17}\)
4. \(4\frac{5}{9} - 2\frac{8}{9} = \frac{41}{9} - \frac{26}{9} = \frac{41 - 26}{9} = \frac{15}{9} = \frac{5}{3} = 1\frac{2}{3}\)

Ответ: 1) \(\frac{9}{14}\), 2) \(3\frac{9}{14}\), 3) \(\frac{9}{17}\), 4) \(1\frac{2}{3}\).