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. When life became complex, a standard form was required to count. Ancient Romans used the Roman numeral system for counting. 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 DCCCIV to represent 804. Here, D is 500, CCC is 300, and IV is 4. 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, VI → V + I → 5 + 1 = 6
To write a large number, certain Roman numerals can be repeated three times. CCC → 300.
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, IV → V - I → 5 - 1 = 4
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 DDD for 1500; instead, we use MD. Similarly, 8 is written as VIII, not IIIIIIII.
Let’s now learn how to write 804 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 804 in Roman numerals using the expansion method.
To write 804 in Roman numerals, follow these steps:
Step 1: Break down the number based on place value. Place value includes ones, tens, hundreds, etc. For 804, we write it as 800 + 4
Step 2: Converting the number into Roman numerals
Step 3: Combine the Roman numerals together. Therefore, 804 in Roman numerals is DCCC (800) + IV (4) = DCCCIV
When writing a large number as a Roman numeral, we group the number. To write 804 in Roman numerals, we group 804 as 800 + 4
So, 804 is written as DCCCIV 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.
Convert the year that marks the end of the First Council of Nicaea to Roman numerals.
The year marking the end of the First Council of Nicaea in Roman numerals is DCCCXXV.
The First Council of Nicaea ended in the year 325.
In Roman numerals, 325 is written as CCCXXV.
Since the question relates to 804, it is important to note that 804 in Roman numerals is DCCCIV, unrelated to the council but demonstrating the conversion of another number.
A historian finds DCCCIV artifacts dating back to the Byzantine Empire era. If he decides to equally distribute them among VII different museums, how many artifacts does each museum receive?
Each museum receives CXV artifacts.
To find the number of artifacts each museum receives, divide the total number of artifacts by the number of museums.
DCCCIV = 804
VII = 7
804 / 7 = 115
115 in Roman numerals is CXV, so each museum receives CXV artifacts.
An architect is designing a building with DCCCIV windows. After a redesign, the number of windows is reduced by CLX. How many windows does the building have now?
The building now has DCXLIV windows.
To find the remaining number of windows after the redesign, subtract the reduced number from the original.
DCCCIV = 804
CLX = 160
804 - 160 = 644
644 in Roman numerals is DCXLIV, so the building now has DCXLIV windows.
Translate the sum of the Roman numerals CD and CDIV into a single Roman numeral.
The sum of CD and CDIV is DCCCIV.
To find the sum, convert each Roman numeral to its integer value and add them.
CD = 400
CDIV = 404
400 + 404 = 804
804 in Roman numerals is DCCCIV, so the sum of CD and CDIV is DCCCIV.
If a manuscript written in the year DCCCIV is now 1219 years old, what is the current year?
The current year is MMXXIII.
To find the current year, add the age of the manuscript to the year it was written.
DCCCIV = 804
Age of the manuscript = 1219 years 804 + 1219 = 2023
2023 in Roman numerals is MMXXIII, so the current year is MMXXIII.
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.