Ответ:

  1. 97 : 910 = 9−3 = 1/729.
  2. (0,2)2 : (0,2)−2 = (0,2)4 = 1/625.
  3. (2/13)−12 : (2/13)2 = (2/13)−14 = (13/2)14.
  4. (2/5)3 : (2/5)−1 = (2/5)4 = 16/625.