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, 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. 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 CCXXX to represent 230, where CC is 200, X is 20, and III is 10. 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, CCXXX → CC + XXX → 200 + 30 = 230
Rule 2: Repetition Method
To write a large number, there are certain Roman Numerals that can be repeated three times. For example, XXX → 30.
Rule 3: Subtraction Method
If a small number is followed by a large number in Roman Numerals, we subtract the smaller number from the large number. For example, XC → C - X → 100 - 10 = 90
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 LL for 100; instead, we use C.
Let’s now learn how to write 230 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 230 in Roman numerals using the expansion method.
To write 230 in Roman Numerals, follow the steps:
Step 1: Break the number based on place value. Place value includes ones, tens, hundreds, etc.
For 230, we write it as 200 + 30
Step 2: Converting the number into Roman Numerals
200 in Roman Numerals — CC
30 in Roman Numerals — XXX
Step 3: Combine them together. Therefore, 230 in Roman Numerals is CC (200) + XXX (30) = CCXXX
When writing a large number into Roman Numerals, we group the number.
To write 230 in Roman Numeral, we group 230 as 200 + 30.
200 in Roman Numerals — CC
30 in Roman Numerals — XXX
So, 230 is written as CCXXX 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 ways to avoid them.
In an ancient Roman game, a player starts with CC and gains XXX points in two rounds. How many points does the player have now?
The player now has CCLX points.
The initial points are CC = 200.
The player gains XXX = 30 points.
Total points = 200 + 30 = 230.
230 in Roman numerals is CCLX.
A historian is cataloging artifacts and finds that there are CCXXX artifacts in one section and L in another. How many artifacts are there in total?
There are CCL in total.
CCXXX = 230
L = 50
Total artifacts = 230 + 50 = 280.
280 in Roman numerals is CCLXXX.
A Roman general has a legion of CCC soldiers and loses LXX soldiers in battle. How many are left?
There are CCXXX soldiers left.
The initial number of soldiers is CCC = 300.
LXX soldiers are lost, which is 70.
Remaining soldiers = 300 - 70 = 230.
230 in Roman numerals is CCXXX.
An ancient Roman architect is planning a construction that requires a perimeter of CCXXX meters. If each side of the structure is L meters, how many sides will the structure have?
The structure will have IV sides.
Total perimeter = CCXXX = 230 meters.
Each side = L = 50 meters.
Number of sides = 230 / 50 = 4.6, which means the structure is a rectangle with 4 sides, not a perfect square.
Four sides in Roman numerals is IV.
A scholar is translating an ancient text and finds a phrase that mentions the number of days CCXXX, which is to be divided equally among X scribes. How many days does each scribe work?
Each scribe works XXIII days.
Total days = CCXXX = 230 days.
Number of scribes = X = 10.
Days per scribe = 230 / 10 = 23.
23 in Roman numerals is XXIII.
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.