Ответ:

  1. \(8 \times 2 = 16\).
  2. \(24 : 3 = 8\).
  3. \(14 : 2 = 7\).
  4. \(3 \times 5 = 15\).
  5. \(42 + 18 - 40 = 60 - 40 = 20\).
  6. \(18 + 26 + 16 = 44 + 16 = 60\).
  7. \(80 - 34 + 16 = 46 + 16 = 62\).
  8. \(53 + 37 - 66 = 90 - 66 = 24\).

Ответ: 16; 8; 7; 15; 20; 60; 62; 24.