Roman Numeral [ Roman Numbers 1 to 100 ]

Roman Numeral [ Roman Numbers 1 to 100 ]

Roman numerals are a special kind of numeral system that originated in ancient Rome. These numbers have remained in Europe until the Late Middle Ages. Alphabet letters are used in this system to represent roman numerals. Before understanding the roman numbers, first, see what roman alphabets are? Because roman alphabets denote roman numbers.

There are only 23 alphabets in the roman system. J, U and W are not treated as roman letters from 26 English alphabets. There are as follows A, B, C, D, E, F, G, H, I, K, L, M, N, O, P, Q, R, S, T, V, X, Y and Z.

Also Read: Numbers in Words in English

Few important roam numbers denoted by roman letters are I = 1, V = 5, X = 10, L = 50, C = 100, D = 500, M = 1000.

Now find the list of roman numbers from 1-100

1I34XXXIV67LXVII
2II35XXXV68LXVIII
3III36XXXVI69LXIX
4IV37XXXVII70LXX
5V38XXXVIII71LXXI
6VI39XXXIX72LXXII
7VII40XL73LXXIII
8VIII41XLI74LXXIV
9IX42XLII75LXXV
10X43XLIII76LXXVI
11XI44XLIV77LXXVII
12XII45XLV78LXXVIII
13XIII46XLVI79LXXIX
14XIV47XLVII80LXXX
15XV48XLVIII81LXXXI
16XVI49XLIX82LXXXII
17XVII50L83LXXXIII
18XVIII51LI84LXXXIV
19XIX52LII85LXXXV
20XX53LIII86LXXXVI
21XXI54LIV87LXXXVII
22XXII55LV88LXXXVIII
23XXIII56LVI89LXXXIX
24XXIV57LVII90XC
25XXV58LVIII91XCI
26XXVI59LIX92XCII
27XXVII60LX93XCIII
28XXVIII61LXI94XCIV
29XXIX62LXII95XCV
30XXX63LXIII96XCVI
31XXXI64LXIV97XCVII
32XXXII65LXV98XCVIII
33XXXIII66LXVI99XCIX
    100C

Now let’s see what the rules involved in writing the above roman numbers are.

  1. When a number symbol appears after a greater number symbol, it will be added. For Example- VII = V + I + I = 5 + 1 +1 = 7.
  2. When a number symbol appears before a greater number symbol, it will be subtracted. For Example- IV = V – I = 5 – 1= 4.
  3. When a number symbol appears after a greater number symbol, it will be subtracted. For Example- XXV = X + X + V = 10 + 10 + 5 = 25.
  4. When a number symbol appears before a greater number symbol, it will be subtracted. For Example- XXXIX = X + X + X + X – I = 10 + 10 + 10 + 10 – 1 = 39.

To make it more simple, break the number into Ones, Tens, Hundreds, and Thousands, and write it down.

Also Read: Girolamo Cardano- Man Behind Complex Numbers.

Convert 1985 to Roman Numerals

Break 1984 into 1000, 900, 80, 5 and then do conversion

1000 = M

900 = CM

90 = XC

5 = V

1000 + 900 + 80 + 5 = 1985, so 1985 = MCMXCV

Convert 2020 to Roman Numerals

Break 2020 into 1000, 1000, 10, 10 and then do conversion

1000 = M

1000 = M

10 = X

10 = X

1000 + 1000 + 10 + 10 = 2020, so 2020 = MMXX

Convert 1562 to Roman Numerals

Break 1562 into 1000, 500, 60, 2 and then do conversion

1000 = M

500 = D

60 = LX

2 = II

1000 + 500 + 60 + 2 = 1562, so 1562 = MDLXII

Convert 2658 to Roman Numerals

Break 2658 into 1000, 1000, 600, 50, 8 and then do conversion

1000 = M

1000 = M

600 = DC

50 = L

8 = VIII

1000 + 1000 + 600 + 50 + 8 = 2658, so 2658 = MMDCLVIII

Also Read: How many zeroes in a Million, Billion, Trillion, Nonillion, Quadrillion, Sextillion, Googol

Now see the roman numbers from 100 -1000

100C600DC
101CI601DCI
109CIX609DCIX
200CC700DCC
201CCI701DCCI
209CCIX709DCCIX
300CCC800DCCC
301CCCI801DCCCI
309CCCIX809DCCCIX
400CD899DCCCXCIX
401CDI900DM
409CDIX901DMI
500D909DMIX
501DI999DMXCIX
509DIX1000M

Rules to Convert Numbers to Roman Numerals

The three primary rules for reading and writing Roman numerals:

  1. Any letter can be repeated maximum for three times, for example, CCC= 300, XX= 20, and so on.
  2. If one or more letters are placed after another letter with greater value, then add that amount.

XII = 12 (10 + 2 = 12)

DCCC = 800 (500 + 100 + 100 + 100 = 800)

Example of additive Rule

265100 + 100 + 50 + 10 + 5C + C + L + X + VCCLXV
133100 + 10 + 10 + 10 + 3C + X + X + X + IIICXXXIII
182100 + 50 + 10 + 10 + 10 + 2C + L + X + X + X + IICLXXXII
  1. If a letter is placed before another letter of greater value, subtract that amount.

XC= 90 (100 – 10 = 90)

CM = 900 ( 1000 – 100 = 900 )

Example of Subtractive Rule 

    
199100 + (100 – 10) + (10 – 1)C + X + C + I + XCXCIX
143100 + (50 – 10) + 3C + L + X + IIICXLIII
296100 + 100 + (100 – 10) + 5 + 1C + C + X + C + V + ICCXCVI

More Examples:

123    CXXIII

189    CLXXXIX

256    CCLVI

294    CCXCIV

333    CCCXXXIII

369    CCCLXIX

452    CDLII

492    CDXCII

543    DXLIII

588    DLXXXVIII

654    DCLIV

691    DCXCI

710    DCCX

744    DCCXLIV

888    DCCCLXXXVIII

873    DCCCLXXIII

926    CMXXVI

985    CMLXXXV

1510501001000
IVXLCM
500010000500001000005000001000000
V¯X¯L¯C¯D¯M¯

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