Ответ:

  1. \(12 + 6 \cdot 3 - 19 = 12 + 18 - 19 = 11\).
  2. \(7 \cdot 4 - 6 \cdot 4 = 28 - 24 = 4\).
  3. \(90 - 3 \cdot 6 : 2 = 90 - 18 : 2 = 90 - 9 = 81\).
  4. \(27 + (60 - 48) : 4 = 27 + 12 : 4 = 27 + 3 = 30\).
  5. \((74 - 46) : 4 + 16 = 28 : 4 + 16 = 7 + 16 = 23\).
  6. \(85 - 6 \cdot (13 - 9) = 85 - 6 \cdot 4 = 85 - 24 = 61\).