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Last updated on February 24th, 2025
Roman numerals are a way of expressing numbers using symbols. The symbols I, V, X, L, C, D, and M are used in this system. Roman numerals are commonly used in royal titles, book names, sequences, and more. 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 represent? Those are the Roman numerals. In earlier times, people used fingers, sticks, bones, etc., to count. As life became more complex, a standard system was required. Ancient Romans developed the Roman numeral system for counting. The symbols I (1), V (5), X (10), L (50), C (100), D (500), and M (1000) are used for this purpose.
In Roman numerals, we use CXLI to represent 141, where C is 100, XL is 40, and I is 1. Let’s learn more about Roman numerals and how to 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 a smaller number is placed after a larger number, indicating addition. For example, XI → X + I → 10 + 1 = 11.
Rule 2: Repetition Method
Some Roman numerals can be repeated up to three times to form larger numbers. For example, III → 3.
Rule 3: Subtraction Method
When a smaller number precedes a larger number, the smaller number is subtracted. For example, IX → X I → 10 1 = 9.
Rule 4: Limitation Rule
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. Similarly, 8 is written as VIII, not IIIIIIII.
Let’s now learn how to write 141 in Roman numerals. Follow these methods to write the number in Roman numerals.
In the expansion method, the number is broken down based on place value. The steps to write 141 in Roman numerals using this method are:
Step 1: Break down the number based on place value: 141 = 100 + 40 + 1.
Step 2: Convert each part into Roman numerals:
100 in Roman numerals — C
40 in Roman numerals — XL
1 in Roman numerals — I
Step 3: Combine the Roman numerals:
Therefore, 141 in Roman numerals is C (100) + XL (40) + I (1) = CXLI.
When writing a large number in Roman numerals, we can group the number. For 141, we group it as 100 + 40 + 1:
100 in Roman numerals — C
40 in Roman numerals — XL
1 in Roman numerals — I
Thus, 141 is written as CXLI in Roman numerals.
A historian is cataloging artifacts and finds that he has CXLI Roman coins and needs to evenly distribute them into VII display cases. How many coins will each display case hold?
Calculate the sum of LXX and LXXI.
A library receives a shipment of CCLXXXII books and needs to organize them into II sections. How many books will be in each section?
Find the difference between CL and IX.
Write the Roman Numeral for 70 + 71 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.