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Last updated on February 22nd, 2025
Roman numerals are the 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, use Roman Numerals. Have you noticed these symbols and wondered what they 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 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 CDL to represent 450, where C is 100, D is 500, 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 a smaller number is placed after the larger number. For example, XVI → X + V + I → 10 + 5 + 1 = 16
To write a large number, certain Roman Numerals can be repeated up to three times. For example, CCC → 300.
If a small number precedes 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 write 10 as X, not VV, and 8 as VIII, not IIIIIIII.
Let’s now learn how to write 450 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 450 in Roman numerals using the expansion method. To write 450 in Roman Numerals, follow the steps:
Step 1: Break the number based on the place value, such as ones, tens, hundreds, etc. For 450, we write it as 500 - 50
Step 2: Converting the number into Roman Numerals 500 in Roman Numeral — D 50 in Roman Numeral — L
Step 3: Using the subtraction method as 50 precedes 500. Therefore, 450 in Roman Numeral is D - L = CDL
When writing a large number into Roman Numerals, we group the number. To write 450 in Roman Numerals, we group 450 as 500 - 50.
So, 450 is written as CDL in Roman Numerals.
Calculate the quotient of MCM and CD.
A historian is organizing a collection of CDXL ancient artifacts equally into XLV display cases. How many artifacts will each case contain?
Add the amounts represented by CCC and CL to represent an ancient treasure's value.
What is the difference between D and CD?
Express the sum of CCXL and CCX using Roman numerals.
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.