How to Convert 13 into Roman Numerals

Roman numerals are made up of seven letters: I (1), V (5), X (10), L (50), C (100), D (500), and M (1000). To write a number like 13, we combine these letters starting from the largest value and working down to the smallest.

Let’s break 13 into parts and build the Roman numeral step by step:

10 fits into what’s left of the number one time.
That means we add X to our Roman numeral because one × ten equals 10.

1 fits into what’s left of the number three times.
That means we add III to our Roman numeral because three × one equals 3.

Final Answer

After combining all the parts, the Roman numeral for 13 is:

XIII

Tip: If a smaller numeral appears before a larger one (like IV), it means you subtract. If a smaller one comes after a larger one (like VI), it means you add. You’ll see both styles when needed.

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