Table Of Contents
Last updated on February 20th, 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 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 CCX to represent 210, here CC is 200 and X is 10. 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.
Rule 1: Addition Method
The addition method is used when the smaller number is placed after the larger number, then it is the addition method. For example, CCX → C + C + X → 100 + 100 + 10 = 210
Rule 2: Repetition Method
To write a large number, there are certain Roman Numerals that can be repeated three times. CCC → 300.
Rule 3: Subtraction Method
If a small number is followed by a large number in Roman Numerals we subtract the smaller number from the large number, it is a subtraction method. For example, IX → X - I → 10 - 1 = 9
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 and 8 we write as VIII not IIIIIIII.
Let’s now learn how to write 210 in Roman Numerals. Follow these methods to write the number in Roman Numerals.
By Expansion Method
By Grouping Method
In the expansion method, based on the place value, the number is broken down. In this section, we will learn how to write 210 in Roman numerals using the expansion method.
To write 210 in Roman Numerals, follow the steps,
Step 1: The number is break based on the place value. Place value that is ones, tens, hundreds, etc.
For 210 we write it as 200 + 10
Step 2: Converting the number into Roman Numerals
200 in Roman Numeral — CC
10 in Roman Numeral — X
Step 3: Combining them Roman Numerals together.
Therefore, 210 in Roman Numeral is C (100) + C (100) + X (10) = CCX
When writing a large number into Roman Numeral we group the number.
To write 210 in Roman Numeral, we group 210 as 200 + 10
200 in Roman Numeral — CC
10 in Roman Numeral — X
So, 210 is written as CCX in Roman Numerals.
A historian finds CCX artifacts from an ancient civilization. He decides to distribute these artifacts equally among X museums. How many artifacts does each museum receive?
A treasure chest contains CCX gold coins, and a pirate crew finds another LXXX coins. What is the total number of coins?
Calculate the difference between CCC and CCX.
Convert the sum of CC and X to Roman numerals using the expansion method.
A mathematician is solving a puzzle where she needs to multiply XIV by XV. What is the product in 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.