Last updated on May 26th, 2025
Roman numerals are a way of expressing numbers using symbols: I, V, X, L, C, D, and M. Roman Numerals are used in royal titles, book names, sequences, and more. Here we will be discussing Roman Numerals, rules, and examples.
Have you ever seen royal titles like Henry I, Henry II, and wondered what these symbols represented? Those are Roman Numerals. Early people used fingers, sticks, and bones for counting. As life became complex, a standard form was required.
Ancient Romans used the Roman Numeral system: I (1), V (5), X (10), L (50), C (100), D (500), and M (1000). In Roman Numerals, we use DXXV to represent 525, where D is 500, XX is 20, and V is 5.
Let’s learn more about Roman numerals and how we write them.
There are basic rules for writing numbers in Roman Numerals. Let's discuss some rules needed when writing numbers in Roman Numerals.
This method is used when a smaller number is placed after a larger number. For example, DXXV → D + XX + V → 500 + 20 + 5 = 525.
Certain Roman Numerals can be repeated up to three times. For example, XX → 20 (X is repeated twice).
If a smaller number precedes a larger number, the smaller is subtracted. For example, IV → V - I → 5 - 1 = 4.
Symbols cannot be repeated more than three times, and some symbols like V, L, and D cannot be repeated. For instance, 10 is X, not VV; 8 is VIII, not IIIIIIII.
Let’s learn how to write 525 in Roman Numerals using these methods:
In the expansion method, numbers are broken down based on place value. We'll learn to write 525 in Roman numerals this way.
Step 1: Break down the number based on place value: hundreds, tens, and ones. For 525, write it as 500 + 20 + 5.
Step 2: Convert these numbers into Roman Numerals:
500 in Roman Numeral - D
20 in Roman Numeral - XX
5 in Roman Numeral - V
Step 3: Combine these Roman Numerals together. Therefore, 525 in Roman Numerals is D (500) + XX (20) + V (5) = DXXV.
When writing large numbers into Roman Numerals, we group the numbers. To write 525 in Roman Numerals, group 525 as 500 + 20 + 5.
So, 525 is written as DXXV in Roman Numerals.
Students often make mistakes when writing numbers in Roman Numerals. To master Roman Numerals, we can learn common mistakes and how to avoid them.
Calculate the sum of DXXV and CL.
The sum of DXXV and CL is DCLXXV.
In Roman numerals, DXXV is 525 and CL is 150.
The sum of DXXV and CL is 525 + 150 = 675.
675 in Roman numerals is written as DCLXXV.
A historian finds a scroll stating that an ancient army had DXXV soldiers, and they were divided into V equal groups. How many soldiers were in each group?
Each group had CV soldiers.
The total number of soldiers is DXXV, which is 525.
Dividing this by V (5), we get 525 / 5 = 105.
105 in Roman numerals is CV.
A collector has DXXV coins and plans to add CC to his collection. What will be the new total?
The new total will be DCCXXV.
DXXV is 525 and CC is 200.
Adding them gives 525 + 200 = 725.
725 in Roman numerals is DCCXXV.
Subtract C from DXXV and express the result in Roman numerals.
The result is CDXXV.
DXXV is 525 and C is 100.
The difference is 525 - 100 = 425.
425 in Roman numerals is CDXXV.
Express the result of multiplying DXXV by II in Roman numerals.
The result is ML.
DXXV is 525 and II is 2.
Multiplying them gives 525 × 2 = 1050.
1050 in Roman numerals is ML.
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.