Last updated on May 26th, 2025
Roman numerals are a system of expressing numbers using symbols: I, V, X, L, C, D, and M. They are used in various contexts such as royal titles, book names, sequences, and more. Here, we will discuss Roman numerals, rules, and examples.
Roman numerals have been used historically in many contexts, such as in royal titles, like Henry VI or Henry VIII. Have you ever wondered what these symbols (VI, VIII) represent? They are Roman numerals.
Ancient Romans developed this numeral system to count and record numbers. The symbols used are I (1), V (5), X (10), L (50), C (100), D (500), and M (1000).
In Roman numerals, 618 is written as DCXVIII, where D is 500, C is 100, X is 10, V is 5, and I is 1. 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, we will discuss some basic rules that need to be remembered when writing a number in Roman numerals.
The addition method is used when a smaller number is placed after a larger number, indicating addition. For example, DCXVIII → D + C + X + V + I + I + I → 500 + 100 + 10 + 5 + 1 + 1 + 1 = 618
Certain Roman numerals can be repeated up to three times to represent numbers. For example, III represents 3.
If a smaller number precedes a larger number, it is subtracted from the larger number. For example, IX → X - I → 10 - 1 = 9
Symbols cannot be repeated more than three times. Some symbols like V, L, and D cannot be repeated. For example, 10 is not written as VV but as X, and 8 is written as VIII, not IIIIIIII.
Let’s learn how to write 618 in Roman numerals. Follow these methods to write the number in Roman numerals.
In the expansion method, the number is broken down based on place value. In this section, we will learn how to write 618 in Roman numerals using the expansion method. To write 618 in Roman numerals, follow these steps:
Step 1: Break the number based on place value: hundreds, tens, and ones. For 618, we write it as 500 + 100 + 10 + 5 + 1 + 1 + 1
Step 2: Convert each number into Roman numerals:
500 in Roman numerals - D
100 in Roman numerals - C
10 in Roman numerals - X
5 in Roman numerals - V
1 in Roman numerals - I
Step 3: Combine the Roman numerals together. Therefore, 618 in Roman numerals is D (500) + C (100) + X (10) + V (5) + I + I + I (3) = DCXVIII
When writing a number in Roman numerals, we group numbers. To write 618 in Roman numerals, we group 618 as 500 + 100 + 10 + 5 + 1 + 1 + 1
Thus, 618 is written as DCXVIII 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 discovers a scroll listing the cost of items in Roman times. If the scroll lists the cost of two artifacts as DCXVIII and CCXXVI respectively, what is the total cost in Roman numerals?
The total cost of the two artifacts is DCCCXLIV.
To find the total cost, we add DCXVIII and CCXXVI.
DCXVIII = 618
CCXXVI = 226
618 + 226 = 844
844 in Roman numerals is DCCCXLIV.
An ancient Roman architect is drafting a blueprint and needs to divide a length of DCXVIII feet equally into VI sections. What is the length of each section in Roman numerals?
The length of each section is CIII.
To find the length of each section, divide DCXVIII by VI.
DCXVIII = 618
VI = 6
618 / 6 = 103
103 in Roman numerals is CIII.
A Roman merchant has DCXVIII denarii and spends CLXXX on supplies. How many denarii does he have left, in Roman numerals?
The merchant has CDXXXVIII denarii left.
Subtract CLXXX from DCXVIII to find the remaining denarii.
DCXVIII = 618
CLXXX = 180
618 - 180 = 438
438 in Roman numerals is CDXXXVIII.
In a Roman game, a player scores DCXVIII points. If another player scores XXV points less, how many points does the second player score in Roman numerals?
The second player scores DXCIII points.
Subtract XXV from DCXVIII to find the second player's score.
DCXVIII = 618
XXV = 25
618 - 25 = 593
593 in Roman numerals is DXCIII.
Write the Roman numeral for 618 + 150 using the expansion method.
The Roman numeral for 618 + 150 is DCCLXVIII.
Step 1: Convert the numbers 618 and 150 into Roman numerals.
618 - DCXVIII
150 - CL
Add the numbers together: 618 + 150 = 768 Using the expansion method: 768 = 700 + 60 + 8 = DCCLXVIII.
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.