Examples of converting Arabic numbers to Roman numerals, how to write numbers down using Roman symbols

Examples of converting Arabic numbers to Roman numerals:

  • 1 = I;
  • 2 = 1 + 1 = I + I = II;
  • 3 = 1 + 1 + 1 = I + I + I = III;
  • 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;

Roman numerals reading rules, summary:

I. The Roman numerals set of basic symbols

II. The rule of numerals repetition

III. Subtractive notation of the Roman numerals

IV. Additive notation of the Roman numerals


How to convert Arabic numbers to Roman numerals: breaking down into place value subgroups

Examples of converting Arabic numbers to Roman numerals


Roman numerals from 1 to 100

Roman numerals from 1 to 1000

Mathematical operations with Roman numerals:

I. Addition. Learn by example how to add Roman numerals the right way, like the Romans calculated, steps, explanations

II. Subtraction. Learn by example how to subtract Roman numerals the right way, like the Romans calculated, steps, explanations

III. Addition and subtraction. Learn by example how to add and subtract Roman numerals the right way, like the Romans calculated, steps, explanations