Ответ:

  1. 784 + 296 = 1080.
  2. 365 + 645 = 1010.
  3. 999 + 854 = 1853.
  4. 652 + 999 = 1651.
  5. 3599 + 111 = 3710.
  6. 234 + 7214 = 7448.