Recap: What Are Roman Numerals? Before we begin figuring out how to add and subtract Roman style, let’s recap how the Roman numeral system that we learned about last time works.

Explore an alternative way to communicate numbers using the anchor numbers 5 and 10 and the ancient Roman counting system based on letters.

In this Maths article, learn how to read and write numbers to 100.

Film credits, fancy clocks, championship titles, building dates—Roman numerals pop up when people want to add a touch of gravitas or tradition.

In this Maths article, learn how to read and write numbers to 100.

Roman Numerals and Their Values ... If you wanted to write the value 60 as Roman numerals, that's easy: LX. Reverse the two values, however, and it's a completely different value: XL = 40. Why?