Ответ:

  1. MMMD = 1000 + 1000 + 1000 + 500 = 3500.
  2. IV = 5 − 1 = 4.
  3. XIX = 10 + 9 = 19.
  4. MCMXCVII = 1000 + 900 + 90 + 7 = 1997.
  5. MDCLXXI = 1000 + 500 + 100 + 50 + 10 + 10 + 1 = 1671.

Ответ: 3500; 4; 19; 1997; 1671.