Last updated on May 26th, 2025
Roman numerals are a way of expressing numbers using symbols: I, V, X, L, C, D, and M. They are used in various contexts, such as royal titles, book names, and sequences. Here, we will discuss Roman numerals, the rules governing them, and provide examples.
Have you ever wondered what symbols like VIII or IX in titles or names represent? They are Roman numerals.
In ancient times, people used simple counting methods like fingers or sticks. As life became more complex, a standardized numeral system was needed. The Romans developed this system using the symbols I (1), V (5), X (10), L (50), C (100), D (500), and M (1000).
In Roman numerals, we use DCCLXIV to represent 764, where D is 500, C is 100, L is 50, X is 10, and IV is 4. Let’s learn more about Roman numerals and how to write them.
Certain basic rules guide the writing of numbers in Roman numerals. In this section, we will discuss these rules.
When a smaller number follows a larger one, you add them. For example, LX → L + X → 50 + 10 = 60.
Some Roman numerals can be repeated up to three times to represent a number. For example, CCC → 300.
When a smaller number precedes a larger one, you subtract the smaller from the larger. For example, IV → V - I → 5 - 1 = 4.
Symbols cannot be repeated more than three times. Some symbols, like V, L, and D, cannot be repeated. For example, 10 is X, not VV.
Let’s explore how to write 764 in Roman numerals by using different methods such as Expansion and Grouping.
The expansion method involves breaking down a number based on its place value. Here's how to write 764 using this method:
Step 1: Break the number based on place value: 700 + 60 + 4.
Step 2: Convert each number into Roman numerals:
Step 3: Combine these Roman numerals: Therefore, 764 in Roman numerals is DCCLXIV.
When writing large numbers in Roman numerals, grouping can simplify the process. To write 764, group it as 700 + 60 + 4.
So, 764 is written as DCCLXIV in Roman Numerals.
Students often make mistakes when writing Roman numerals. To master them, it's useful to learn common errors and how to avoid them.
A historian finds two ancient documents labeled DCC and LXIV. Find the total number of pages they contain together.
The total number of pages is DCCLXIV.
DCC is 700 and LXIV is 64.
The total number is 700 + 64 = 764.
764 in Roman Numerals is DCCLXIV.
A librarian has a collection of DCCLXIV ancient scrolls to be evenly distributed into LXXII boxes. How many scrolls will each box contain?
Each box will contain X scrolls.
To find the number of scrolls per box, divide the total number of scrolls by the number of boxes. DCCLXIV = 764 LXXII = 72 764 / 72 = 10.61, which rounds down to 10 scrolls per box since partial scrolls cannot be distributed. 10 in Roman Numerals is X.
A collector combines two sets of coins: CCCLXXXII and CCCLXXXII. How many coins does he have in total?
The total number of coins is DCCLXIV.
CCCLXXXII is 382.
Adding them together gives 382 + 382 = 764.
764 in Roman Numerals is DCCLXIV.
Determine the difference between DCCC and DCCXXXVI.
The difference between DCCC and DCCXXXVI is LXIV.
The difference of two numbers is found by subtracting one from the other.
DCCC = 800
DCCXXXVI = 736
800 - 736 = 64
64 in Roman Numerals is LXIV,
Express the sum of CCCXLII and CDXXII using the expansion method in Roman numerals.
The sum of CCCXLII and CDXXII is DCCLXIV.
Convert the numbers into Roman Numerals:
CCCXLII = 342
CDXXII = 422
Add the numbers: 342 + 422 = 764
Using the expansion method: 764 = 700 + 60 + 4 = DCCLXIV.
Hiralee Lalitkumar Makwana has almost two years of teaching experience. She is a number ninja as she loves numbers. Her interest in numbers can be seen in the way she cracks math puzzles and hidden patterns.
: She loves to read number jokes and games.