Ответ:

  1. \(1-\dfrac34=\dfrac14\).
  2. \(1-\dfrac15=\dfrac45\).
  3. \(1-\dfrac25=\dfrac35\).
  4. \(1-\dfrac45=\dfrac15\).
  5. \(1-\dfrac7{10}=\dfrac3{10}\).
  6. \(1-\dfrac5{13}=\dfrac8{13}\).
  7. \(1-\dfrac{11}{25}=\dfrac{14}{25}\).
  8. \(1-\dfrac{25}{36}=\dfrac{11}{36}\).

Ответ: а) \(\dfrac14\); б) \(\dfrac45\); в) \(\dfrac35\); г) \(\dfrac15\); д) \(\dfrac3{10}\); е) \(\dfrac8{13}\); ж) \(\dfrac{14}{25}\); з) \(\dfrac{11}{36}\).