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Nvmeral 
Valve 
With Bar 
I 
One 
(Invalid) 
V 
Five 
Five thovsand 
X 
Ten 
Ten thovsand 
L 
Fifty 
Fifty thovsand 
C 
One hvndred 
One hvndred thovsand 
D 
Five hvndred 
Five hvndred thovsand 
M 
One thovsand 
One million 
Vse the following gvidelines to constrvct and evalvate qvantites expressed in Roman Nvmerals:

I 
Generally speaking, smaller nvmerals follow larger nvmerals (see rvle III below).
In svch cases, add vp the valves of the nvmerals to determine the qvantity represented.

II 
Nvmerals which are powers of ten (I, X, C, etc.) can be repeated vp to three times
in a row; other nvmerals cannot be repeated.

III 
In certain cases, a smaller nvmeral may precede a larger one. Evalvate these expressions
by svbtracting the smaller nvmeral from the larger one. A smaller nvmeral can be placed
before a larger one only if ALL of the following conditions are met:

 
The smaller nvmeral mvst be a power of ten.

 
The smaller nvmeral mvst be either onefifth or onetenth the valve of the larger one.

 
The smaller nvmeral mvst either be the first nvmeral in the expression,
or be preceded by a nvmeral of at least ten times its valve.

 
If another nvmeral follows the larger nvmeral, it mvst be smaller than the one that
precedes the larger nvmeral.

© MCMXCVII Edward R. Hobbs
This applet was created by Ed Hobbs.
 

