Roman Numerals in Detail

What are Roman Numerals ?

Roman Numerals system is another system used apart of Hindu-Arabic system.

The Roman numerals are
I 1
II 2
III 3
IV 4
V 5
VI 6
VII 7
VIII 8
IX 9
X 10
X1 11
X11 12
XX 20
L 50
C 100
D 500
M 1000

Rules for writing Roman Numerals

1) In Roman numerals a symbol is not repeated more than three times, but the symbols V, L and D are never repeated.

2) Roman numerals are read from left to right and the letters of Roman numerals are arranged from the largest to the smallest.

3) If a symbol of smaller value is written to the right of a symbol of greater value, then its value gets added to the value of greater symbol.

VI = 5 + 1 = 6

4) If a symbol of smaller value is written to the left of a symbol of greater value, its then value is subtracted from the value of the greater symbol.

IV = 5 – 1 = 4

5)The symbol I can be subtracted from V and X only.

6)The symbol X can be subtracted from L, M and C only.
 
To learn how to write Roman numbers from 1 to 1000, click here.
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