Last updated on May 26th, 2025
Roman numerals are a way of expressing numbers using symbols. I, V, X, L, C, D, and M are the symbols we use. Roman numerals are used in royal titles, book names, sequences, and so on. Here we will be discussing Roman numerals, rules, and examples.
The royal titles, such as Henry I, Henry II, and so on, often use Roman numerals. Have you noticed the names and wondered what these symbols (I and II) represented? Those are Roman numerals.
Earlier, people used to count using fingers, sticks, bones, etc. As life became more complex, a standard form was required to count. Ancient Romans used the Roman numeral system for counting. I (1), V (5), X (10), L (50), C (100), D (500), and M (1000) are the symbols we use to count.
In Roman numerals, we use CDLXVI to represent 466, where C is 100, D is 500, L is 50, X is 10, V is 5, and I is 1. Let’s learn more about Roman numerals and how we write them.
There are certain basic rules for writing 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 the smaller number is placed after the larger number. For example, VI → V + I → 5 + 1 = 6.
Certain Roman numerals can be repeated up to three times. For example, III → 3.
If a small number is followed by a large number, we subtract the smaller number from the large number. For example, IX → X - I → 10 - 1 = 9.
The 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 VV for 10; instead, we use X, and for 8, we write VIII, not IIIIIIII.
Let’s now learn how to write 466 in Roman numerals. Follow these methods to write the number in Roman numerals.
In the expansion method, based on the place value, the number is broken down. In this section, we will learn how to write 466 in Roman numerals using the expansion method. To write 466 in Roman numerals, follow these steps:
Step 1: Break the number based on place value: ones, tens, hundreds, etc. For 466, we write it as 400 + 60 + 6.
Step 2: Convert each part into Roman numerals. 400 in Roman numerals — CD 60 in Roman numerals — LX 6 in Roman numerals — VI
Step 3: Combine the Roman numerals together. Therefore, 466 in Roman numerals is CD (400) + LX (60) + VI (6) = CDLXVI.
When writing a large number into Roman numerals, we group the number. To write 466 in Roman numerals, we group 466 as 400 + 60 + 6.
So, 466 is written as CDLXVI in Roman numerals.
Students make mistakes when writing a number in Roman numerals. To master Roman numerals, we can learn a few common mistakes and the ways to avoid them.
Calculate the area of a rectangle with a length of CXXIII and a width of IV.
The area of the rectangle is CDXCII.
To find the area of a rectangle, multiply the length by the width.
Length = CXXIII = 123
Width = IV = 4
Area = 123 × 4 = 492
492 in Roman Numerals is CDXCII.
A historian finds a ledger that documents CDXC years of reign split equally among X kings. How many years did each king reign?
Each king reigned for XLIX years.
To find the number of years each king reigned, divide the total years by the number of kings.
CDXC = 490
X = 10
490 / 10 = 49
49 in Roman numerals is XLIX.
Determine the total sum of the Roman numerals CCXL and CCXXVI.
The sum of CCXL and CCXXVI is CDLXVI.
Sum is the result of adding two numbers.
CCXL = 240
CCXXVI = 226
240 + 226 = 466
466 in Roman Numerals is CDLXVI.
A sculpture was completed in the year CDLXXVI. If a restoration took place XI years later, in what year was the restoration completed?
The restoration was completed in the year CDLXXXVII.
To find the year of restoration, add XI to CDLXXVI.
CDLXXVI = 476
XI = 11
476 + 11 = 487
487 in Roman numerals is CDLXXXVII.
Express the result of adding CCCLXXXVIII and LXXVIII using Roman numerals.
The result of adding CCCLXXXVIII and LXXVIII is CDLXVI.
Step 1: Convert the numbers into Roman numerals.
CCCLXXXVIII = 388
LXXVIII = 78
Add the numbers:
388 + 78 = 466
466 in Roman numerals is CDLXVI.
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.