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Count n Roman numbers. What is the largest number you can write? Print out these charts to learn.

1 = I
2 = II
3 = III = IIV
4 = IV = IIII
5 = V
6 = VI
7 = VII
8 = VIII
9 = IX = VIIII
10 = X
11 = XI
12 = XII
13 = XIII
14 = XIV
15 = XV
16 = XVI
17 = XVII
18 = XVIII
19 = XIX
20 = XX
21 = XXI
22 = XXII
23 = XXIII
24 = XXIV
25 = XXV
26 = XXVI
27 = XXVII
28 = XXVIII
29 = XXIX
30 = XXX
31 = XXXI
32 = XXXII
33 = XXXIII
40 = XL
50 = L
60 = LX
70 = LXX
80 = LXXX
90 = XC
99 = XCIX
100 = C
200 = CC
300 = CCC
400 = CD
500 = D
600 = DC
700 = DCC
800 = DCCC
900 = CM
1000 = M
1000 = M
2000 = MM
3000 = MMM
4000 = MN
5000 = N
6000 = NM
7000 = NMM
8000 = NMMM
9000 = MH
10000 = H
10000 = H
20000 = HH
30000 = HHH
40000 = HP
50000 = P
60000 = PH
70000 = PHH
80000 = PHHH
90000 = HG
100000 = G
100000 = G
200000 = GG
300000 = GGG
400000 = GF
500000 = F
600000 = FG
700000 = FGG
800000 = FGGG
900000 = GS
1000000 = S

Roman numerals are constructed using additive and subtractive principles.

Addition is the main rule. Simply add up the digits. Example: XXI = 10+10+1 = 21.

Subtraction happens when a smaller digit comes before a larger digit. In that case, deduct the smaller digit from the larger digit. Example: IX = 10−1 = 9. The usual subtractive combinations are: IV (4), IX (9), XL (40), XC (90), CD (400), CM (900), MN (4000), MH (9000), HP (40,000), HG (90,000), GF (400,000) and GS (900,000). so 99 is IC or XCIX = 100−10 + 10−1 = 99, or 100-1 = 99.

Subtraction is a shorthand for four successive digits as there cannot be more than 3 successive digits in any Roman numeral. Thus, IIII=IV, XXXX=XL and so on.

Use to learn how addition and subtraction work. The converter splits up a Roman numeral to its parts and teaches you how to decode it letter by letter.[1]

Number zero does not exist in Roman numerals.

Large Roman numerals Edit

Millions
1000000 = S
2000000 = SS
3000000 = SSS
4000000 = I̅V̅
5000000 = V̅
6000000 = V̅I̅
7000000 = V̅I̅I̅
8000000 = V̅I̅I̅I̅
9000000 = I̅X̅
10000000 = X̅
20000000 = X̅X̅
30000000 = X̅X̅X̅
40000000 = X̅L̅
50000000 = L̅
60000000 = L̅X̅
70000000 = L̅X̅X̅
80000000 = L̅X̅X̅X̅
90000000 = X̅C̅
100000000 = C̅
200000000 = C̅C̅
300000000 = C̅C̅C̅
400000000 = C̅D̅
500000000 = D̅
600000000 = D̅C̅
700000000 = D̅C̅C̅
800000000 = D̅C̅C̅C̅
900000000 = C̅M̅
Milliards
(billions)
1000000000 = M̅
2000000000 = M̅M̅
3000000000 = M̅M̅M̅
4000000000 = M̅N̅
5000000000 = N̅
6000000000 = N̅M̅
7000000000 = N̅M̅M̅
8000000000 = N̅M̅M̅M̅
9000000000 = M̅H̅
10000000000 = H̅
20000000000 = H̅H̅
30000000000 = H̅H̅H̅
40000000000 = H̅P̅
50000000000 = P̅
60000000000 = P̅H̅
70000000000 = P̅H̅H̅
80000000000 = P̅H̅H̅H̅
90000000000 = H̅G̅
100000000000 = G̅
200000000000 = G̅G̅
300000000000 = G̅G̅G̅
400000000000 = G̅F̅
500000000000 = F̅
600000000000 = F̅G̅
700000000000 = F̅G̅G̅
800000000000 = F̅G̅G̅G̅
900000000000 = G̅S̅
Trillions
1000000000000 = S̅
2000000000000 = S̅S̅
3000000000000 = S̅S̅S̅
4000000000000 = I̅̅V̅̅
5000000000000 = V̅̅
6000000000000 = V̅̅I̅̅
7000000000000 = V̅̅I̅̅I̅̅
8000000000000 = V̅̅I̅̅I̅̅I̅̅
9000000000000 = I̅̅X̅̅
10000000000000 = X̅̅
20000000000000 = X̅̅X̅̅
30000000000000 = X̅̅X̅̅X̅̅
40000000000000 = X̅̅L̅̅
50000000000000 = L̅̅
60000000000000 = L̅̅X̅̅
70000000000000 = L̅̅X̅̅X̅̅
80000000000000 = L̅̅X̅̅X̅̅X̅̅
90000000000000 = X̅̅C̅̅
100000000000000 = C̅̅
200000000000000 = C̅̅C̅̅
300000000000000 = C̅̅C̅̅C̅̅
400000000000000 = C̅̅D̅̅
500000000000000 = D̅̅
600000000000000 = D̅̅C̅̅
700000000000000 = D̅̅C̅̅C̅̅
800000000000000 = D̅̅C̅̅C̅̅C̅̅
900000000000000 = C̅̅M̅̅
Quadrillions
1000000000000000 = M̅̅
2000000000000000 = M̅̅M̅̅
3000000000000000 = M̅̅M̅̅M̅̅
4000000000000000 = M̅̅N̅̅
5000000000000000 = N̅̅
6000000000000000 = N̅̅M̅̅
7000000000000000 = N̅̅M̅̅M̅̅
8000000000000000 = N̅̅M̅̅M̅̅M̅̅
9000000000000000 = M̅̅H̅̅
10000000000000000 = H̅̅
20000000000000000 = H̅̅H̅̅
30000000000000000 = H̅̅H̅̅H̅̅
40000000000000000 = H̅̅P̅̅
50000000000000000 = P̅̅
60000000000000000 = P̅̅H̅̅
70000000000000000 = P̅̅H̅̅H̅̅
80000000000000000 = P̅̅H̅̅H̅̅H̅̅
90000000000000000 = H̅̅G̅̅
100000000000000000 = G̅̅
200000000000000000 = G̅̅G̅̅
300000000000000000 = G̅̅G̅̅G̅̅
400000000000000000 = G̅̅F̅̅
500000000000000000 = F̅̅
600000000000000000 = F̅̅G̅̅
700000000000000000 = F̅̅G̅̅G̅̅
800000000000000000 = F̅̅G̅̅G̅̅G̅̅
900000000000000000 = G̅̅S̅̅
Quintillions
1000000000000000000 = S̅̅
2000000000000000000 = S̅̅S̅̅
3000000000000000000 = S̅̅S̅̅S̅̅
n̅n̅ = 1,000,000 × nn
n̅̅n̅̅ = 1,000,000,000,000 × nn

In order to write large numerals, one draws line above or around numbers. This causes multiplication as per the table above.

Hundreds
500   = IↃ = D
Thousands
1000 = CIↃ = ↀ
2000 = CIↃCIↃ
3000 = CIↃCIↃCIↃ
4000 = CIↃIↃↃ
5000 = IↃↃ = ↁ
6000 = IↃↃCIↃ
7000 = IↃↃCIↃCIↃ
8000 = IↃↃCIↃCIↃCIↃ
9000 = CIↃCCIↃↃ
10000 = CCIↃↃ = ↂ
20000 = CCIↃↃCCIↃↃ
30000 = CCIↃↃCCIↃↃCCIↃↃ
40000 = CCIↃↃIↃↃↃ
50000 = IↃↃↃ
60000 = IↃↃↃCCIↃↃ
70000 = IↃↃↃCCIↃↃCCIↃↃ
80000 = IↃↃↃCCIↃↃCCIↃↃCCIↃↃ
90000 = CCIↃↃCCCIↃↃↃ
100000 = CCCIↃↃↃ​​
500000 = IↃↃↃↃ
Millions
1000000 = CCCCIↃↃↃↃ

There are archaic forms of Roman numbers starting from 500. The system starts with CIↃ being one thousand. Adding C and Ↄ multiplies the figure by 10. Halving the numeral (leave out the C's on the left) divides the number by 2. Thus, CCIↃↃ is 10×1000 = 10000 and IↃↃ is a half of that, 5000.

The archaic forms can be written in two alternative ways, as shown in the image below.

Use to understand modern and archaic Roman numerals. The converter shows you letter by letter what a Roman numeral is made of.[2]

Sources Edit

  1. Roman numeral converter
  2. Roman numeral converter.html

See also Edit

Mayan numerals

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