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 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 DCCCL to represent 850, where D is 500, CCC is 300, and L is 50. 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. For example, DCCCL → D + CCC + L → 500 + 300 + 50 = 850
To write a large number, certain Roman Numerals can be repeated up to three times. For example, CCC → 300.
If a small number is followed by a large number in Roman Numerals, we subtract the smaller number from the large number. For example, XL → L - X → 50 - 10 = 40.
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.
Let’s now learn how to write 850 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 850 in Roman numerals using the expansion method.
To write 850 in Roman Numerals, follow the steps:
Step 1: The number is broken based on the place value. Place values include ones, tens, hundreds, etc. For 850, we write it as 500 + 300 + 50.
Step 2: Converting the number into Roman Numerals
500 in Roman Numeral — D
300 in Roman Numeral — CCC
50 in Roman Numeral — L
Step 3: Combining the Roman Numerals together.
Therefore, 850 in Roman Numerals is D (500) + CCC (300) + L (50) = DCCCL.
When writing a large number into Roman Numeral, we group the number.
To write 850 in Roman Numerals, we group 850 as 500 + 300 + 50.
500 in Roman Numeral — D
300 in Roman Numeral — CCC
50 in Roman Numeral — L
So, 850 is written as DCCCL 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.
Calculate the difference between DCCC and L.
The difference between DCCC and L is DCCL.
The difference of two numbers is found by subtracting one number from the other.
DCCC = 800
L = 50
800 - 50 = 750
750 in Roman Numerals can be written as DCCL.
A historian discovers DCCCXL ancient coins. If they distribute these coins equally among X archaeologists, how many coins does each archaeologist receive?
Each archaeologist receives LXXXIV coins.
To find the number of coins each archaeologist receives, divide the total number of coins by the number of archaeologists.
DCCCXL = 840
X = 10
840 / 10 = 84
84 in Roman Numerals can be written as LXXXIV.
If a merchant has two chests containing CDXL and CDX coins respectively, what is the total number of coins?
The total number of coins is DCCCXC.
The sum of the coins is the result of adding the two numbers.
CDXL = 440
CDX = 410
440 + 410 = 850
850 in Roman Numerals is DCCCXC.
A marathon course is CCL kilometers long. If a runner completes the course D times, what is the total distance covered?
The total distance covered is MCL.
To find the total distance, multiply the course length by the number of times it is completed.
CCL = 250
D = 4
250 × 4 = 1000
1000 in Roman Numerals can be written as M.
Express the sum of DCL and CCXL using the expansion method in Roman Numerals.
The Roman numeral for the sum of DCL and CCXL is DCCCL.
Step 1: Convert the numbers into Roman numerals.
DCL = 650
CCXL = 240
Add the numbers together: 650 + 240 = 890
Using expansion method: 890 = 800 + 90 = DCCCL
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.