Решим данные примеры:
- \(\frac{7}{15} + \frac{6}{15} - \frac{9}{15} = \frac{7+6-9}{15} = \frac{4}{15}\)
- \(9\frac{5}{13} - (4\frac{1}{13} + 2\frac{7}{13}) = 9\frac{5}{13} - 4\frac{1}{13} - 2\frac{7}{13} = 9\frac{5}{13} - 6\frac{8}{13} = 8\frac{18}{13} - 6\frac{8}{13} = 2\frac{10}{13}\)
- \((7\frac{11}{16} - 6\frac{5}{16}) + 2\frac{9}{16} = 1\frac{6}{16} + 2\frac{9}{16} = 3\frac{15}{16}\)
Ответ: 1) \(\frac{4}{15}\); 2) \(2\frac{10}{13}\); 3) \(3\frac{15}{16}\)