Ответ:

  1. \(8\,300 : 10 - 30 = 830 - 30 = 800\).
  2. \(36 \cdot 1\,000 + 20 = 36\,000 + 20 = 36\,020\).
  3. \(200 : (310 - 300) : 5 = 200 : 10 : 5 = 20 : 5 = 4\).
  4. \(400 : (460 - 360) \cdot 4 = 400 : 100 \cdot 4 = 4 \cdot 4 = 16\).
  5. \(61\,000 - 1 = 60\,999\).
  6. \(49\,099 + 1 = 49\,100\).

Ответ: 800; 36 020; 4; 16; 60 999; 49 100.