This is a demonstration of the methods that may have been used to perform calculations with numbers represented in Roman Numerals.
The JavaScript code used by this webpage can be viewed here.
Two versions in Python code can be viewed here and here.
The addition is performed by a method the Romans may have used.
The notation (V) is used to indicate 5000.
The comparison is performed by a method the Romans may have used.
The subtraction is performed by a method the Romans may have used.
The multiplication is performed by a method the Romans may have used.
The notation (V) is used to indicate 5000, (L) to indicate 50000, etc.
In general, ( ) indicates one thousand times the basic numeral,
(( )) indicates one million times the basic numeral.
| I V X L C D M | ___|_____________________________________________________|___ | | I | I V X L C D M | | | | | V | V XXV L CCL D MMD (V) | | | | | X | X L C D M (V) (X) | | | | | L | L CCL D MMD (V) (XXV) (L) | | | | | C | C D M (V) (X) (L) (C) | | | | | D | D MMD (V) (XXV) (L) (CCL) (D) | | | | | M | M (V) (X) (L) (C) (D) (M) | ___|_____________________________________________________|___ | |
A zero quotient is indicated by the symbol N (nulla).
The divison is performed by a method the Romans may have used.
Roman Arithmetic
Copyright © 2016 Harry Whitfield
This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.
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Last updated Saturday, June 16, 2018.