http://mathworld.wolfram.com/RomanNumerals.html

Roman numerals are a system of numerical notations used by the Romans. They are ... character, numerical value. I, 1. V, 5. X, 10. L, 50. C, 100. D, 500. M, 1000 ...

https://www.romannumerals.org/chart-1-10

This is a common Roman Numerals Chart which includes all 7 Roman Numeral Symbols used for representing the numbers of 1, 5, 10, 50, 100, 500, and 1,000.

https://en.wikipedia.org/wiki/Roman_numerals

Roman numerals are essentially a decimal or "base 10" number system. Powers of ten – thousands, hundreds, tens and units – are written ...

https://www.rapidtables.com/math/symbols/roman-numerals-1-100.html

Number, Roman Numeral, Calculation. 0, not defined. 1, I, 1. 2, II, 1+1. 3, III, 1+1+ 1. 4, IV, 5-1. 5, V, 5. 6, VI, 5+1. 7, VII, 5+1+1. 8, VIII, 5+1+1+1. 9, IX, 10-1.

https://www.quia.com/jg/2187415list.html

A, B. I, One. II, Two. III, Three. IV, Four. V, Five. VI, Six. VII, Seven. VIII, Eight. IX, Nine. X, Ten. XI, Eleven. XII, Twelve. XIII, Thirteen. XIV, Fourteen. XV, Fifteen.

https://www.knowtheromans.co.uk/Categories/SubCatagories/RomanNumerals/RomanNumerals1-10/

An awesome Roman numerals table / chart from 1 to 10! With links to a great quiz to test your Roman numerals knowledge, plus other great resources!

https://www.factmonster.com/math/numbers/roman-numerals

There are four basic principles for reading and writing Roman numerals: ... Do not subtract a number from one that is more than 10 times greater (that is, you can ...