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.
Royal titles, such as Henry I, Henry II, and so on, often use Roman numerals. Have you noticed the names and wondered what these symbols represented? Those are Roman Numerals.
Earlier people used fingers, sticks, bones, etc., to count. As life became more complex, a standard form was needed. Ancient Romans used the Roman Numeral system. 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 CDXXXIV to represent 434. Here, C is 100, D is 500, X is 10, 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, let’s 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. For example, VI → V + I → 5 + 1 = 6.
Certain Roman Numerals can be repeated three times. III → 3.
If a small number is followed by a large number, we subtract the smaller number from the larger number. For example, XL → L - X → 50 - 10 = 40.
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 434 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 434 in Roman numerals using the expansion method. To write 434 in Roman Numerals, follow the steps:
Step 1: Break the number based on the place value. Place values are ones, tens, hundreds, etc. For 434, we write it as 400 + 30 + 4.
Step 2: Convert the numbers into Roman Numerals:
400 in Roman Numerals - CD
30 in Roman Numerals - XXX
4 in Roman Numerals - IV
Step 3: Combine these Roman Numerals together. Therefore, 434 in Roman Numerals is CD (400) + XXX (30) + IV (4) = CDXXXIV.
When writing a large number in Roman Numerals, we group the number. To write 434 in Roman Numerals, group 434 as 400 + 30 + 4.
So, 434 is written as CDXXXIV in Roman Numerals.
Students make mistakes when writing numbers in Roman Numerals. To master Roman Numerals, we can learn a few common mistakes and ways to avoid them.
Calculate the product of CXXX and IIII in Roman numerals.
The product of CXXX and IIII is DXX
In numbers, CXXX is 130 and IIII is 4. The product of CXXX and IIII is 130 × 4 = 520. 520 in Roman Numerals is DXX
A library has DLXIV books and wants to distribute them equally among CXXII shelves. How many books will each shelf hold?
Each shelf will hold VI books.
To find the number of books per shelf, divide the total number of books by the number of shelves.
DLXIV = 564
CXXII = 122
564 / 122 = 4.62, rounded down to 4 books per shelf, which can be expressed as VI in Roman numerals.
Find the sum of CCLXXXV and CXLIX using Roman numerals.
The sum of CCLXXXV and CXLIX is CDXXXIV
Sum is the result of adding two numbers.
CCLXXXV = 285
CXLIX = 149
285 + 149 = 434 434 in Roman Numerals is CDXXXIV The sum of CCLXXXV and CXLIX is CDXXXIV
What is the difference between DXXX and XCVI in Roman numerals?
The difference between DXXX and XCVI is CDXXXIV.
The difference of two numbers is the value obtained after subtracting one from the other.
DXXX = 530
XCVI = 96
530 - 96 = 434 434 in Roman Numerals is CDXXXIV.
Write the Roman Numeral for 400 + 34 using the expansion method.
The Roman numeral for 400 + 34 is CDXXXIV
Step 1: Convert the numbers 400 and 34 into Roman numerals.
400 - CD
34 - XXXIV
Add the numbers together: 400 + 34 = 434
Using the expansion method: 434 = 400 + 30 + 4 = CD + XXX + IV = CDXXXIV
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.