Exemples de nombres écrits en chiffres romains

Exemples de transformation des nombres arabes en nombres romains

4 = 5 - 1 = V - I = IV;
5 = V;
6 = 5 + 1 = V + I = VI;
7 = 5 + 2 = 5 + 1 + 1 = V + I + I = VII;
8 = 5 + 3 = 5 + 1 + 1 + 1 = V + I + I + I = VIII;
9 = 10 - 1 = X - I = IX;
11 = 10 + 1 = X + I = XI;
12 = 10 + 2 = 10 + 1 + 1 = X + I + I = XII;
13 = 10 + 3 = 10 + 1 + 1 + 1 = X + I + I + I = XIII;
14 = 10 + 4 = 10 + (5 - 1) = XIV;
47 = 40 + 7 = (50 - 10) + (5 + 2) = (50 - 10) + (5 + 1 + 1) = (L - X) + (V + I + I) = XL + VII = XLVII;
79 = 70 + 9 = (50 + 20) + (10 - 1) = (50 + 10 + 10) + (10 - 1) = (L + X + X) + (X - I) = LXX + IX = LXXIX;
469 = 400 + 60 + 9 = (500 - 100) + (50 + 10) + (10 - 1) = (D - C) + (L + X) + (X - I) = CD + LX + IX = CDLXIX;
2000 = 1000 + 1000 = M + M = MM;
2010 = 2000 + 0 + 10 = 2000 + 10 = (1000 + 1000) + 10 = (M + M) + X = MM + X = MMX;
2234 = 2000 + 200 + 30 + 4 = (1000 + 1000) + (100 + 100) + (10 + 10 + 10) + (5 - 1) = (M + M) + (C + C) + (X + X + X) + (V - I) = MM + CC + XXX + IV = MMCCXXXIV;
4787 = 4000 + 700 + 80 + 7 = (5000 - 1000) + (500 + 100 + 100) + (50 + 10 + 10 + 10) + (5 + 1 + 1) = ((V) - M) + (D + C + C) + (L + X + X + X) + (V + I + I) = M(V) + DCC + LXXX + VII = M(V)DCCLXXXVII;

6787 = 6000 + 700 + 80 + 7 = (5000 + 1000) + (500 + 100 + 100) + (50 + 10 + 10 + 10) + (5 + 1 + 1) = ((V) + M) + (D + C + C) + (L + X + X + X) + (V + I + I) = (V)M + DCC + LXXX + VII = (V)MDCCLXXXVII;
30924 = 30000 + 900 + 20 + 4 = (10000 + 10000 + 10000) + (1000 - 100) + (10 + 10) + (5 - 1) = ((X) + (X) + (X)) + (M - C) + (X + X) + (V - I) = (X)(X)(X) + CM + XX + IV = (X)(X)(X)CMXXIV;
3.999.893 = 3.000.000 + 900.000 + 90.000 + 9.000 + 800 + 90 + 3 = (1.000.000 + 1.000.000 + 1.000.000) + (1.000.000 - 100.000) + (100.000 - 10.000) + (10.000 - 1.000) + (500 + 100 + 100 + 100) + (100 - 10) + (1 + 1 + 1) = ((M) + (M) + (M)) + ((M) - (C)) + ((C) - (X)) + ((X) - M) + (D + C + C + C) + (C - X) + (I + I + I) = (M)(M)(M) + (C)(M) + (X)(C) + M(X) + DCCC + XC + III = (M)(M)(M)(C)(M)(X)(C)M(X)DCCCXCIII;
2012-Oct-17 = 2012-10-17 = MMXII-X-XVII;
1863-Aug-29 = 1863-8-29= (1000 + 800 + 60 + 3)-8-29 = MDCCCLXIII-VIII-XXIX;