- а) \(\frac{2}{9} + \frac{6}{9} - \frac{3}{9} = \frac{2+6-3}{9} = \frac{5}{9}\)
- б) \(8\frac{25}{27} - (3\frac{8}{27} + 2\frac{3}{27}) = 8\frac{25}{27} - 5\frac{11}{27} = 3\frac{14}{27}\)
- в) \((8\frac{3}{17} - 7\frac{15}{17}) + 3\frac{15}{17} = (7\frac{20}{17} - 7\frac{15}{17}) + 3\frac{15}{17} = \frac{5}{17} + 3\frac{15}{17} = 3\frac{20}{17} = 4\frac{3}{17}\)
Ответ: а) \(\frac{5}{9}\); б) \(3\frac{14}{27}\); в) \(4\frac{3}{17}\)