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Roman numerals

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Roman numerals
  • 1 answers

Gaurav Seth 3 years, 10 months ago

The Roman Symbols

Romans Numerals are based on the following symbols:

1

5

10

50

100

500

1000

I

V

X

L

C

D

M

Basic Combinations

Which can be combined like this:

1

2

3

4

5

6

7

8

9

I

II

III

IV

V

VI

VII

VIII

IX

                 

10

20

30

40

50

60

70

80

90

X

XX

XXX

XL

L

LX

LXX

LXXX

XC

                 

100

200

300

400

500

600

700

800

900

C

CC

CCC

CD

D

DC

DCC

DCCC

CM

Forming Numbers - The Rules

When a symbol appears after a larger (or equal) symbol it is added

  • Example: VI = V + I = 5 + 1 = 6
  • Example: LXX = L + X + X = 50 + 10 + 10 = 70

But if the symbol appears before a larger symbol it is subtracted

  • Example: IV = V − I = 5 − 1 = 4
  • Example: IX = X − I = 10 − 1 = 9
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