Last updated on May 26th, 2025
Roman numerals are a way of expressing numbers using symbols. The symbols used in Roman numerals are I, V, X, L, C, D, and M. Roman numerals are used in royal titles, book names, sequences, and so on. Here, we will be discussing Roman numerals, rules, and examples.
Royal titles, such as Henry I, Henry II, and so on, use Roman numerals. Have you ever noticed these symbols and wondered what they represent? Those are the Roman numerals. In ancient times, people used fingers, sticks, bones, etc., to count.
As life became more 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 used in Roman numerals.
In Roman numerals, we use CCCLXXV to represent 375. Here, CCC is 300, L is 50, XX is 20, 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 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, CCCLXXV → CCC (300) + L (50) + XX (20) + V (5) = 375.
Rule 2: Repetition Method
To write a large number, certain Roman numerals can be repeated up to three times. For example, CCC → 300 (C repeated three times).
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, 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 don't write VV for 10; instead, we use X, and for 90, we write XC, not LXXXX.
Let’s now learn how to write 375 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. To write 375 in Roman numerals, follow these steps:
Step 1: Break down the number based on place value: hundreds, tens, and ones.
375 = 300 + 70 + 5
Step 2: Convert each part into Roman numerals:
300 in Roman numerals - CCC
70 in Roman numerals - LXX
5 in Roman numerals - V
Step 3: Combine the Roman numerals together:
Therefore, 375 in Roman numerals is CCC (300) + LXX (70) + V (5) = CCCLXXV.
When writing a number in Roman numerals, we can group the number. To write 375 in Roman numerals, we group it as 300 + 70 + 5.
So, 375 is written as CCCLXXV in Roman numerals.
Students often make mistakes when writing numbers in Roman numerals. To master Roman numerals, we can learn a few common mistakes and ways to avoid them.
A historian is deciphering an ancient text and finds a reference to DCLXXV laborers who worked for XV hours. Calculate the total number of labor hours worked.
The total number of labor hours worked is MMDCLXXV.
DCLXXV is 675 and XV is 15. The total number of labor hours is calculated by multiplying the number of laborers by the hours worked: 675 × 15 = 10,125. 10,125 in Roman Numerals can be written as MMDCLXXV.
A museum is cataloging a collection of MMCCL ancient coins, which are to be distributed equally into LXXV display cases. Determine the number of coins per display case.
The number of coins per display case is XXIX.
To find the number of coins per display case, divide the total number of coins by the number of display cases. MMCCL = 2,250 and LXXV = 75. Therefore, 2,250 / 75 = 30. 30 in Roman numerals is XXIX.
Calculate the sum of CDL and CCCXXV.
The sum of CDL and CCCXXV is DCCLXXV.
Sum is the result of adding two numbers. CDL = 450 and CCCXXV = 325. Adding them gives 450 + 325 = 775. 775 in Roman Numerals is DCCLXXV.
Find the difference between DCCC and CDXXV.
The difference between DCCC and CDXXV is CCCLXXV.
The difference of two numbers is the value obtained when subtracting one number from the other.
DCCC = 800 and CDXXV = 425.
So, 800 - 425 = 375. 375 in Roman Numerals can be written as CCCLXXV.
Write the Roman Numeral for 375 using the expansion method.
The Roman numeral for 375 is CCCLXXV.
Step 1: Break down the number into its component parts using place value.
375 = 300 + 70 + 5
Step 2: Convert each component into Roman numerals.
300 = CCC
70 = LXX
5 = V
Step 3: Combine the Roman numerals.
375 = CCC + LXX + V = CCCLXXV
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.