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 royal titles, book names, sequences, and more. Here, we will discuss Roman Numerals, their rules, and examples.
Royal titles, such as Henry I, Henry II, and so on, use Roman Numerals. Have you ever noticed these symbols and wondered what they represent? They are part of the Roman Numeral system, which was developed as a standard counting method when life became more complex. Ancient Romans used symbols like I (1), V (5), X (10), L (50), C (100), D (500), and M (1000) to count.
In Roman Numerals, we use DCCCXVIII to represent 818: D (500), CCC (300), X (10), and VIII (8). Let’s learn more about Roman numerals and how to write them.
There are certain basic rules to write a number in Roman Numerals. In this section, let’s discuss some basic rules that need to be remembered when writing a number in Roman numerals.
The addition method is used when smaller numbers are placed after larger numbers. For example, DCCCXVIII → D + CCC + X + VIII → 500 + 300 + 10 + 8 = 818.
Some Roman Numerals can be repeated up to three times to form larger numbers. For example, CCC → 300.
When a smaller number precedes a larger number, it is subtracted. For example, IX → X - I → 10 - 1 = 9.
Symbols cannot be repeated more than three times, and some symbols like V, L, and D cannot be repeated. For example, we won’t write DDD for 1500; instead, we use M and D.
Let’s learn how to write 818 in Roman Numerals using different methods:
In the expansion method, a number is broken down based on place value. Here’s how to write 818 in Roman numerals using this method:
Step 1: Break down 818 based on place value: 800 + 10 + 8.
Step 2: Convert each number into Roman Numerals.
Step 3: Combine the Roman Numerals: Therefore, 818 in Roman Numerals is DCCC (800) + X (10) + VIII (8) = DCCCXVIII.
When writing large numbers in Roman Numerals, group the numbers. To write 818 in Roman Numerals, group it as 800 + 10 + 8.
So, 818 is written as DCCCXVIII in Roman Numerals.
Students often make mistakes when writing numbers in Roman Numerals. To master Roman Numerals, we can learn about common mistakes and how to avoid them.
Calculate the difference between DCCCXVIII and CCXLIV.
The difference between DCCCXVIII and CCXLIV is DLXXIV.
The difference of two numbers is found by subtracting one from the other.
DCCCXVIII = 818
CCXLIV = 244
818 - 244 = 574
574 in Roman Numerals can be written as DLXXIV.
A historian discovers a chest with DCCCXVIII coins and wants to distribute them equally among XLVI people. How many coins does each person receive?
Each person receives XVII coins.
To find the number of coins each person receives, divide the total number of coins by the total number of people.
DCCCXVIII = 818
XLVI = 46
Therefore, 818 / 46 = 17.
17 in Roman numerals is XVII.
If a library adds CCLXXII new books to their collection of DCCCXVIII books, what is the total number of books now?
The total number of books is MLXXXX.
The total number of books is the sum of the existing books and the new books.
DCCCXVIII = 818
CCLXXII = 272
818 + 272 = 1090
1090 in Roman Numerals is MLXXXX.
What is the quotient when DCCCXVIII is divided by IX?
The quotient when DCCCXVIII is divided by IX is XCI.
To find the quotient, divide the number by the divisor.
DCCCXVIII = 818
IX = 9
818 / 9 = 91
91 in Roman numerals is XCI.
Convert the sum of DCCCXVIII and CLXII into Roman Numerals using the expansion method.
The Roman numeral for the sum of DCCCXVIII and CLXII is CMLXXX.
Step 1: First convert the numbers 818 and 162 into Roman numerals
818 - DCCCXVIII
162 - CLXII
Add the numbers together: 818 + 162 = 980
Using expansion method: 980 = 900 + 80 = CMLXXX.
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.