Ответ:

  1. 48 + 7 + 3 = 48 + 10 = 58.
  2. 37 + 9 + 3 = 37 + 12 = 49.
  3. 12 + 8 + 26 + 4 = (12 + 8) + (26 + 4) = 20 + 30 = 50.
  4. 37 + 13 + 7 + 3 = (37 + 13) + (7 + 3) = 50 + 10 = 60.
  5. 64 + 18 + 6 = 64 + 24 = 88.
  6. 71 + 16 + 4 = 71 + 20 = 91.

Ответ: 58; 49; 50; 60; 88; 91.