Last updated on May 26th, 2025
Roman numerals are the 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. to count earlier.
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 CCCLXX to represent 370, here CCC is 300, L is 50, and XX is 20. 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.
The addition method is used when the smaller number is placed after the larger number, then it is the addition method. For example, CCCLXX → CCC + L + XX → 300 + 50 + 20 = 370
To write a large number, there are certain Roman Numerals that can be repeated three times. CCC → 300 (C is repeated three times).
If a small number is followed by a large number in Roman Numerals, we subtract the smaller number from the large number, it is a subtraction method. For example, IX → X - I → 10 - 1 = 9
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 and 8 we write as VIII not IIIIIIII.
Let’s now learn how to write 370 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 370 in Roman numerals using the expansion method.
To write 370 in Roman Numerals, follow the steps:
Step 1: The number is broken based on the place value: ones, tens, hundreds, etc.
For 370 we write it as 300 + 50 + 20
Step 2: Converting the number into Roman Numerals
300 in Roman Numeral — CCC
50 in Roman Numeral — L
20 in Roman Numeral — XX
Step 3: Combining them Roman Numerals together.
Therefore, 370 in Roman Numeral is CCC (300) + L (50) + XX (20) = CCCLXX
When writing a large number into Roman Numeral we group the number.
To write 370 in Roman Numeral, we group 370 as 300 + 50 + 20
300 in Roman Numeral — CCC
50 in Roman Numeral — L
20 in Roman Numeral — XX
So, 370 is written as CCCLXX 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 the ways to avoid them.
A merchant has CCCLXX apples and wants to distribute them equally among XXXVII vendors. Determine how many apples each vendor will receive.
Each vendor will receive X apples.
To determine how many apples each vendor receives, divide the total number of apples by the number of vendors.
CCCLXX = 370
XXXVII = 37
Therefore, CCCLXX / XXXVII = 370 / 37 = 10.
10 in Roman numerals is X.
Find the difference between CD and CCCLXX.
The difference between CD and CCCLXX is XXX.
The difference of two numbers is the value obtained when subtracting one number from another.
CD = 400
CCCLXX = 370
400 - 370 = 30
30 in Roman numerals is XXX
A historian is studying ancient artifacts and finds that a total of DXL artifacts were retrieved, out of which CCCLXX are coins. How many artifacts are not coins?
The number of artifacts that are not coins is CLXX.
To find the number of artifacts that are not coins, subtract the number of coins from the total number of artifacts.
DXL = 540
CCCLXX = 370
540 - 370 = 170
170 in Roman numerals is CLXX.
Calculate the sum of CXC and CLXXX.
The sum of CXC and CLXXX is CCCLXX.
The sum is the result of adding two numbers.
CXC = 190
CLXXX = 180
190 + 180 = 370
370 in Roman numerals is CCCLXX.
Write the Roman Numeral for 300 + 70 using the expansion method.
The Roman numeral for 300 + 70 is CCCLXX.
Step 1: Break down the numbers 300 and 70 into Roman numerals.
300 = CCC
70 = LXX
Add the numbers together: 300 + 70 = 370
Using the expansion method: 370 = 300 + 70 = CCCLXX
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.