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