Ответ:

  1. \(\frac{1}{2}+0.05=0.5+0.05=0.55\).
  2. \(\frac{8}{25}-0.2=0.32-0.2=0.12\).
  3. \(0.7+\frac{1}{5}=0.7+0.2=0.9\).
  4. \(\frac{3}{4}-0.15=0.75-0.15=0.6\).
  5. \(\frac{19}{50}+0.02=0.38+0.02=0.4\).

Ответ: \(0.55;\ 0.12;\ 0.9;\ 0.6;\ 0.4\).