Ответ:
- \(\frac{5}{18}+\frac{4}{18}=\frac{9}{18}=\frac{1}{2}\).
- \(\frac{25}{34}-\frac{8}{34}=\frac{17}{34}=\frac{1}{2}\).
- \(3\frac{13}{45}+6\frac{17}{45}=9\frac{30}{45}=9\frac{2}{3}\).
- \(12\frac{43}{56}-7\frac{22}{56}=5\frac{21}{56}=5\frac{3}{8}\).
Ответ: 1) \(\frac{1}{2}\); 2) \(\frac{1}{2}\); 3) \(9\frac{2}{3}\); 4) \(5\frac{3}{8}\).
