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Last updated on February 21st, 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. 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 CCIII to represent 203, where CC is 200 and III is 3. 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, CCIII → CC + III → 200 + 3 = 203
Rule 2: Repetition Method
To write a large number, there are certain Roman Numerals that can be repeated up to three times. For example, III → 3.
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, IV → V - I → 5 - 1 = 4
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. Similarly, for 8, we write VIII, not IIIIIII.
Let’s now learn how to write 203 in Roman Numerals. Follow these methods to write the number in Roman Numerals.
By Expansion Method
By Grouping Method
In the expansion method, based on the place value, the number is broken down. In this section, we will learn how to write 203 in Roman numerals using the expansion method.
To write 203 in Roman Numerals, follow the steps:
Step 1: Break the number based on place value: hundreds, tens, ones.
For 203, we write it as 200 + 3.
Step 2: Converting the number into Roman Numerals:
200 in Roman Numerals — CC
3 in Roman Numerals — III
Step 3: Combine them into Roman Numerals:
Therefore, 203 in Roman Numerals is CC (200) + III (3) = CCIII
When writing a large number into Roman Numerals, we group the number.
To write 203 in Roman Numerals, we group 203 as 200 + 3.
200 in Roman Numerals — CC
3 in Roman Numerals — III
So, 203 is written as CCIII in Roman Numerals.
A historian discovers a document from ancient Rome that states there were CCIII gladiators in the Colosseum. If each gladiator fought against II opponents, how many total battles were recorded?
An art collector has CCIII unique Roman coins and wants to distribute them equally into XIII display cases. How many coins will each display case contain?
Find the sum of CLX and XLIII.
What is the difference between CCXL and XXXVII?
Write the Roman Numeral for 90 + 113 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.