136 LearnersLast updated on May 26th, 2025
424 in Roman Numerals
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.
What is 424 in Roman Numerals?
Royal titles, such as Henry I, Henry II, and so on, use Roman Numerals. Have you noticed these symbols and wondered what they represent? Those are Roman Numerals.
Earlier, people used fingers, sticks, bones, etc., to count. As life became complex, a standard form was required. 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 CDXXIV to represent 424. Here, CD is 400, XX is 20, and IV is 4. Let’s learn more about Roman numerals and how we write them.
Basic Rules for 424 in Roman Numerals
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.
Rule 1: Addition Method
The addition method is used when the smaller number is placed after the larger number. For example, XX → X + X → 10 + 10 = 20.
Rule 2: Repetition Method
To write a larger number, certain Roman Numerals can be repeated up to three times. III → 3.
Rule 3: Subtraction Method
If a small number precedes a large number in Roman Numerals, we subtract the smaller number from the large number. For example, IV → V - I → 5 - 1 = 4.
Rule 4: Limitation Rule
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.
How to Write 424 in Roman Numerals
Let’s now learn how to write 424 in Roman Numerals. Follow these methods to write the number in Roman Numerals:
- By Expansion Method
- By Grouping Method
424 in Roman Numeral by Expansion Method
In the expansion method, based on the place value, the number is broken down. In this section, we will learn how to write 424 in Roman numerals using the expansion method. To write 424 in Roman Numerals, follow the steps:
Step 1: Break the number based on the place value: hundreds, tens, and ones. For 424, we write it as 400 + 20 + 4.
Step 2: Convert the number into Roman Numerals.
400 in Roman Numerals - CD
20 in Roman Numerals - XX
4 in Roman Numerals - IV
Step 3: Combine the Roman Numerals together. Therefore, 424 in Roman Numerals is CD (400) + XX (20) + IV (4) = CDXXIV.
424 in Roman Numeral by Grouping Method
When writing a large number in Roman Numerals, we group the number. To write 424 in Roman Numerals, we group 424 as 400 + 20 + 4.
- 400 in Roman Numerals - CD
- 20 in Roman Numerals - XX
- 4 in Roman Numerals - IV
So, 424 is written as CDXXIV in Roman Numerals.
Numbers Related to 424 in Roman Numerals
Roman Numerals follow a certain pattern. In this section, we will learn some numbers related to the Roman numeral 424:
| Number | Roman Numeral | Breakdown |
|---|---|---|
| 400 | CD | 500 - 100 = 400 |
| 410 | CDX | 400 + 10 = 410 |
| 420 | CDXX | 400 + 10 + 10 = 420 |
| 421 | CDXXI | 400 + 10 + 10 + 1 = 421 |
| 422 | CDXXII | 400 + 10 + 10 + 2 = 422 |
| 423 | CDXXIII | 400 + 10 + 10 + 3 = 423 |
| 424 | CDXXIV | 400 + 10 + 10 + 4 = 424 |
Common Mistakes and How to Avoid Them in 424 Roman Numerals
Students make mistakes when writing a number in Roman Numerals. To master Roman Numerals, we can learn a few common mistakes and ways to avoid them.
Mistake 1
Errors in repetition method
The repetition method can be confusing for beginners as it states that Roman Numerals cannot be repeated more than three times. In contrast, some Roman Numerals such as V, L, and D cannot be repeated.
424 in Roman Numerals Examples
Problem 1
What is the sum of CD and XXIV?
The sum of CD and XXIV is CDXXIV.
Explanation
In Roman numerals, CD is 400 and XXIV is 24. Adding these together gives 400 + 24 = 424.
Therefore, 424 in Roman numerals is CDXXIV.
Problem 2
A historian found CDXXIV ancient coins and divided them equally among VIII museums. How many coins did each museum receive?
Each museum received LIII coins.
Explanation
To determine how many coins each museum receives, divide the total number of coins by the number of museums:
CDXXIV / VIII
CDXXIV is 424 and VIII is 8.
Therefore, 424 ÷ 8 = 53. In Roman numerals, 53 is LIII.
Problem 3
A sculpture has CCCXLVII pieces and needs LXXVII more to complete the set. How many pieces will the complete set have?
The complete set will have CDXXIV pieces.
Explanation
Adding the existing pieces to the needed pieces:
CCCXLVII is 347 and LXXVII is 77.
Therefore, 347 + 77 = 424. In Roman numerals, 424 is CDXXIV.
Problem 4
A collector sold CDXXIV stamps and later realized he had originally CCC stamps. How many stamps did he purchase after selling?
He purchased CXXIV stamps after selling.
Explanation
To find out how many stamps were purchased after selling, subtract the original number from the final number:
CDXXIV - CCC
CDXXIV is 424 and CCC is 300.
Thus, 424 - 300 = 124. In Roman numerals, 124 is CXXIV.
Problem 5
Write the Roman Numeral for 400 + 20 + 4 using the expansion method.
The Roman numeral for 400 + 20 + 4 is CDXXIV.
Explanation
Step 1: Convert each number into Roman numerals.
400 - CD
20 - XX
4 - IV
Combine these to get 424: CD + XX + IV = CDXXIV.
FAQs on 424 in Roman Numerals
1.What is 400 in Roman Numerals?
2.How to write 424 in Roman numerals?
3.What is 450 in Roman Numerals?
4.Is CDXXIV a prime number?
5.What are the multiples of 424?
6.How can children in Vietnam use numbers in everyday life to understand 424 in Roman Numerals?
7.What are some fun ways kids in Vietnam can practice 424 in Roman Numerals with numbers?
8.What role do numbers and 424 in Roman Numerals play in helping children in Vietnam develop problem-solving skills?
9.How can families in Vietnam create number-rich environments to improve 424 in Roman Numerals skills?
Important Glossaries for 424 in Roman Numerals
- Addition Rule: The addition method is used when a larger numeral is followed by a smaller numeral, and their values are added.
- Grouping Method: Here, the given number is grouped based on place value and then converted into Roman Numerals.
- Repetition Rule: Certain symbols (I, X, C, M) in the Roman numeric system can be repeated only up to three times.
- Subtraction Rule: The subtraction method is used when a smaller numeral precedes a larger numeral, subtracting the smaller value.
- Limitation Rule: Roman Numerals like V, L, and D cannot be repeated.
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About BrightChamps in Vietnam
Hiralee Lalitkumar Makwana
About the Author
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.
Fun Fact
: She loves to read number jokes and games.
