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 more. Here we will be discussing Roman numerals, rules, and examples.
Royal titles, such as Henry I, Henry II, and so on, often use Roman numerals. Have you noticed these symbols (I, II, etc.) and wondered what they represent? Those are Roman numerals.
In ancient times, people used fingers, sticks, bones, etc., to count. As life became more complex, a standard form was required. 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.
In Roman numerals, we use DCXXV to represent 625, where D is 500, C is 100, X is 10, 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 to remember when writing numbers in Roman numerals.
The addition method is used when the smaller number is placed after the larger number. For example, XV → X + V → 10 + 5 = 15.
Certain Roman numerals can be repeated up to three times. For instance, III → 3.
If a smaller number precedes a larger number in Roman numerals, it is subtracted from the larger number. For example, IX → X - I → 10 - 1 = 9.
Symbols cannot be repeated more than three times, and some symbols like V, L, and D cannot be repeated. For example, we don't write VV for 10; instead, we use X, and for 8, we write VIII, not IIIIIIII.
Let’s learn how to write 625 in Roman numerals. Follow these methods:
In the expansion method, the number is broken down based on place value. Here’s how to write 625 in Roman numerals using the expansion method:
Step 1: Break down the number based on place values: hundreds, tens, and ones. For 625, we write it as 500 + 100 + 10 + 10 + 5.
Step 2: Convert these to Roman numerals:
500 in Roman Numerals - D
100 in Roman Numerals - C
10 in Roman Numerals - X
5 in Roman Numerals - V
Step 3: Combine them together. Therefore, 625 in Roman numerals is D + C + X + X + V = DCXXV.
When writing a number in Roman numerals, we group numbers based on place values. To write 625 in Roman numerals, group 625 as 500 + 100 + 10 + 10 + 5.
So, 625 is written as DCXXV in Roman numerals.
Students often make mistakes when writing numbers in Roman numerals. To master Roman numerals, we can learn from common mistakes and avoid them.
Find the quotient of MCL and XXV.
The quotient of MCL and XXV is XLIV.
In numbers, MCL is 1150 and XXV is 25. The quotient of MCL and XXV is 1150 ÷ 25 = 46. 46 in Roman Numerals can be written as XLVI.
A historian discovered CCCXX ancient coins and wants to distribute them equally among V villages. Find the number of coins each village will receive.
Each village will receive LXIV coins.
To find the number of coins each village receives, divide the total number of coins by the number of villages.
CCCXX = 320
V = 5
Therefore, CCCXX ÷ V = 320 ÷ 5 = 64. 64 in Roman numerals can be written as LXIV.
Calculate the sum of CDLXXX and CXLV.
The sum of CDLXXX and CXLV is DCXXV.
Sum is the result of adding two numbers.
CDLXXX = 480
CXLV = 145
480 + 145 = 625
625 in Roman Numerals is DCXXV. The sum of CDLXXX and CXLV is DCXXV.
What is the difference between DCC and LXXV?
The difference between DCC and LXXV is DCXXV.
The difference of two numbers is the value we get when subtracting one number from the other.
DCC = 700
LXXV = 75
700 - 75 = 625
625 in Roman Numerals can be written as DCXXV.
Write the Roman Numeral for 500 + 125 using the expansion method.
The Roman numeral for 500 + 125 is DCXXV.
Step 1: First convert the numbers 500 and 125 into Roman numerals.
500 - D
125 - CXXV
Add the numbers together: 500 + 125 = 625 Using the expansion method: 625 = 500 + 100 + 20 + 5 = DCXXV.
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.