Ответ:

  1. \(3+1=4\)
  2. \(4-1=3\)
  3. \(1+2=3\)
  4. \(5-3=2\)
  5. \(2+2=4\)
  6. \(5-4=1\)
  7. \(3+2=5\)
  8. \(2-1=1\)