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Last updated on February 24th, 2025
Roman numerals are the 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.
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 CCCLXIX to represent 369, where CCC is 300, LX is 60, and IX is 9. 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.
Rule 1: Addition Method
The addition method is used when the smaller number is placed after the larger number. For example, XI → X + I → 10 + 1 = 11. In 369, this applies in LX (50 + 10) and IX (10 - 1).
Rule 2: Repetition Method
To write a larger number, there are certain Roman numerals that can be repeated up to three times. For example, III → 3. In 369, CCC is 100 + 100 + 100 = 300.
Rule 3: Subtraction Method
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.
Rule 4: Limitation Rule
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. For 369, we use CCCLXIX.
Let’s now learn how to write 369 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 369 in Roman numerals using the expansion method.
To write 369 in Roman numerals, follow these steps:
Step 1: Break the number based on the place value: hundreds, tens, ones.
For 369, we write it as 300 + 60 + 9
Step 2: Convert each number into Roman numerals:
- 300 in Roman numerals — CCC
- 60 in Roman numerals — LX
- 9 in Roman numerals — IX
Step 3: Combine these Roman numerals together.
Therefore, 369 in Roman numerals is CCC (300) + LX (60) + IX (9) = CCCLXIX.
When writing a large number in Roman numerals, we group the number.
To write 369 in Roman numerals, we group 369 as 300 + 60 + 9:
- 300 in Roman numerals — CCC
- 60 in Roman numerals — LX
- 9 in Roman numerals — IX
So, 369 is written as CCCLXIX in Roman numerals.
A historian finds a document from ancient Rome stating that the total number of soldiers in two legions were CCCLX and IX. Find the total number of soldiers.
An archaeologist discovers CCCLXIX ancient coins divided equally into IX groups. How many coins are in each group?
A mathematician is adding the ages of two Roman artifacts, one being CC and the other being CLXIX. What is the total age of the artifacts?
A museum display states that the difference in years between the founding of two ancient cities is CCCLX and CCCLXI. What is the difference in years?
Write the Roman Numeral for the sum of 300 and 69 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.