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Last updated on February 20th, 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.
Royal titles, such as Henry I, Henry II, and so on, use Roman numerals. Have you noticed these symbols (I and II) and wondered what they represented?
Those are Roman numerals. Earlier, people used fingers, sticks, bones, etc., to count. When life became more complex, a standard form was required to count. Ancient Romans used the Roman numeral system to count. 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 CLIV to represent 154, where C is 100, L is 50, I is 1, and V is 5. Let’s learn more about Roman numerals and how we 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 the smaller number is placed after the larger number. For example, VI → V + I → 5 + 1 = 6.
To write a large number, there are certain Roman numerals that can be repeated three times. III → 3.
If a smaller number precedes a larger number in Roman numerals, we subtract the smaller number from the larger number. For example, IV → V - I → 5 - 1 = 4.
The symbols cannot be repeated more than three times, and some symbols like V, L, and D cannot be repeated. For example, we write 8 as VIII, not IIIIIIII.
Let’s now learn how to write 154 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 154 in Roman numerals using the expansion method.
To write 154 in Roman numerals, follow the steps:
Step 1: Break the number based on place value. Place value that is ones, tens, hundreds, etc.
For 154, we write it as 100 + 50 + 4.
Step 2: Convert each number into Roman numerals.
- 100 in Roman numerals — C
- 50 in Roman numerals — L
- 4 in Roman numerals — IV
Step 3: Combine them together.
Therefore, 154 in Roman numerals is C (100) + L (50) + IV (4) = CLIV.
When writing a large number into Roman numerals, we group the number.
To write 154 in Roman numerals, we group 154 as 100 + 50 + 4.
- 100 in Roman numerals — C
- 50 in Roman numerals — L
- 4 in Roman numerals — IV
So, 154 is written as CLIV in Roman numerals.
A historian found a manuscript noting a transaction of CL books being exchanged for IV coins each. What was the total amount of coins in Roman numerals?
A collector has DXXIV ancient coins and wants to distribute them equally among XXIV friends. How many coins will each friend receive?
Calculate the result of subtracting XCIV from CCLXIII.
If a row of trees is planted with CXLII trees and another row with XII more trees, how many trees are there in total?
Write the Roman Numeral for 37 + 117 using the expansion method.
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.