The Facts On File Algebra Handbook

CHARTS & TABLES Roman Numerals

CHARTS & TABLES Roman Numerals

Roman Numerals

Arabic Roman

1I

5V

10 X

50 L

100 C

500 D

1,000 M

5,000 V

• 10,000 X


• 
  

  1,000,000 M

  
  


• 
  

There are seven Roman numerals that can represent any whole Arabic number by

properly placing the numerals next to each other. There are a few simple rules that

help convert the value of Roman numerals to Arabic:

Sum

If a numeral is followed by another numeral that is of lesservalue, they are read as a

sum. For example, in VI, the value of V (five) is followed by the value of I (one), and

their overall value is the sum of five and one, or six.

VI 6

XVI 16

XXVI 26

LXVI 66

Difference

If the numeral is followed by another numeral that is of greatervalue, then they are

read as a difference. For example, in IV, the value of I (one) is followed by the value

of V (five), and their overall value is the difference, or four.

IV 4

IX 9

XL 40

XC 90

(continues)