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 first rule - Roman numerals set of basic symbols

II. The second rule - numerals repetition

III. The third rule - subtractive notation of the Roman numerals

IV. The fourth rule - 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