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Last updated on February 23rd, 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. 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. to count earlier. 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 DXV to represent 515, here D is 500, X is 10, and V is 5.
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. For example, XV → X + V → 10 + 5 = 15
To write a large number, there are certain Roman Numerals that can be repeated three times. III → 3.
If a small number is followed by a large number in Roman Numerals, we subtract the smaller number from the large number. For example, IX → X - I → 10 - 1 = 9
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, and 8 we write as VIII, not IIIIIIII.
Let’s now learn how to write 515 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 515 in Roman numerals using the expansion method. To write 515 in Roman Numerals, follow the steps,
Step 1: Break the number based on the place value. Place value that is ones, tens, hundreds, etc. For 515, we write it as 500 + 10 + 5
Step 2: Converting the number into Roman Numerals
Step 3: Combining them Roman Numerals together. Therefore, 515 in Roman Numeral is D (500) + X (10) + V (5) = DXV
When writing a large number into Roman Numerals, we group the number. To write 515 in Roman Numeral, we group 515 as 500 + 10 + 5.
So, 515 is written as DXV in Roman Numerals.
Calculate the sum of DXV and CL.
A historian counted DXV artifacts and wants to divide them equally into V groups. How many artifacts will each group receive?
What is the product of DXV and II?
Find the difference between DXX and V.
Write the Roman numeral for 500 + 15 using the expansion method.
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.