Ответ:

  1. 286 = 200 + 80 + 6
  2. 461 = 400 + 60 + 1
  3. 704 = 700 + 4
  4. 305 = 300 + 5
  5. 440 = 400 + 40
  6. 972 = 900 + 70 + 2
  7. 802 = 800 + 2
  8. 905 = 900 + 5
  9. 480 = 400 + 80
  10. 323 = 300 + 20 + 3