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Last updated on February 23rd, 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 these 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. As 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 DCCXV to represent 715, where D is 500, CC is 200, 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 large numbers, certain Roman numerals can be repeated up to three times. For example, CCC → 300.
If a smaller number precedes a larger number in Roman numerals, we subtract the smaller number from the larger 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. For 8, we write VIII, not IIIIIIII.
Let’s now learn how to write 715 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 715 in Roman numerals using the expansion method.
To write 715 in Roman numerals, follow the steps:
Step 1: Break the number based on the place value. Place values are ones, tens, hundreds, etc.
For 715, we write it as 700 + 10 + 5.
Step 2: Convert the numbers into Roman numerals.
700 in Roman numerals — DCC
10 in Roman numerals — X
5 in Roman numerals — V
Step 3: Combine the Roman numerals together.
Therefore, 715 in Roman numerals is DCC (700) + X (10) + V (5) = DCCXV.
When writing a large number in Roman numerals, we group the number.
To write 715 in Roman numerals, we group 715 as 700 + 10 + 5.
700 in Roman numerals — DCC
10 in Roman numerals — X
5 in Roman numerals — V
So, 715 is written as DCCXV in Roman numerals.
A historian finds two ancient artifacts dated DCC and XV years ago. What is the total number of years ago they were dated?
A library has a collection of CDXXV and CCLX books in two sections. How many books are there in total?
An archaeologist discovers a scroll stating there were originally CMX houses in an ancient village, but CLXXXV were destroyed. How many houses remain?
In a competition, a participant scores CDL points in the first round and CCLXV points in the second round. What is their total score?
Write the Roman Numeral for 500 + 215 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.