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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.
The royal titles, such as Henry I, Henry II, and so on. Have you noticed the names and wondered what these symbols (I and II) represented?
Those are the Roman Numerals. Earlier people used to count using fingers, sticks, bones, etc., to count. When life became 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 CLVI to represent 156, where C is 100, L is 50, V is 5, and I is 1. 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, CLVI → C + L + V + I → 100 + 50 + 5 + 1 = 156
To write a large number, there are certain Roman Numerals that can be repeated up to three times. III → 3.
If a smaller number is followed by a larger number in Roman Numerals, we subtract the smaller number from the larger 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 8 is written as VIII, not IIIIIIII.
Let’s now learn how to write 156 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 156 in Roman numerals using the expansion method.
To write 156 in Roman Numerals, follow the steps:
Step 1: Break the number based on place value (ones, tens, hundreds, etc.).
For 156, we write it as 100 + 50 + 6
Step 2: Converting the number into Roman Numerals
- 100 in Roman Numeral — C
- 50 in Roman Numeral — L
- 6 in Roman Numeral — VI
Step 3: Combine them into Roman Numerals together.
Therefore, 156 in Roman Numeral is C (100) + L (50) + VI (6) = CLVI
When writing a large number into Roman Numerals, we group the number.
To write 156 in Roman Numeral, we group 156 as 100 + 50 + 6
- 100 in Roman Numeral — C
- 50 in Roman Numeral — L
- 6 in Roman Numeral — VI
So, 156 is written as CLVI in Roman Numerals.
A historian finds a manuscript with the Roman numerals CLVI and CLXV. Calculate the sum of these numerals.
A librarian needs to distribute CCCCLXXVIII pages equally among III books. How many pages will each book contain?
A math teacher asks students to find the product of XIII and XII.
What is the difference between CC and XLIV in Roman numerals?
Write the Roman Numeral for 78 + 78 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.