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Last updated on February 24th, 2025
Roman numerals are a way of expressing numbers using symbols like I, V, X, L, C, D, and M. These symbols are used in various contexts, such as royal titles, book names, and sequences. In this discussion, we will explore Roman numerals, their rules, and examples.
Royal titles, such as Henry I, Henry II, and others, often include Roman numerals. These symbols (I and II) represent numbers. Ancient people counted using fingers, sticks, bones, etc.
As life became more complex, a standardized counting system was needed. The Romans developed the Roman Numeral system. The symbols I (1), V (5), X (10), L (50), C (100), D (500), and M (1000) are used in this system.
In Roman Numerals, we use CLXXIV to represent 174. Here, C is 100, L is 50, XX is 20, and IV is 4. 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. For example, CLXXIV → C + L + X + X + IV → 100 + 50 + 10 + 10 + 4 = 174.
Rule 2: Repetition Method
To write larger numbers, certain Roman numerals can be repeated up to three times. For example, XX → 20 (X is repeated twice).
Rule 3: Subtraction Method
If a smaller number precedes a larger number in Roman numerals, we subtract the smaller number from the larger number. For example, IV → V - I → 5 - 1 = 4.
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. Similarly, 8 is written as VIII, not IIIIIIII.
Let’s now learn how to write 174 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 174 in Roman numerals using the expansion method.
Step 1: Break the number based on the place value. Place values are hundreds, tens, ones, etc.
For 174, we write it as 100 + 50 + 20 + 4.
Step 2: Convert each number into Roman numerals.
100 in Roman Numeral — C
50 in Roman Numeral — L
20 in Roman Numeral — XX
4 in Roman Numeral — IV
Step 3: Combine the Roman numerals together.
Therefore, 174 in Roman numerals is C (100) + L (50) + XX (20) + IV (4) = CLXXIV.
When writing a large number into Roman numerals, we group the number.
To write 174 in Roman numerals, we group 174 as 100 + 50 + 20 + 4.
100 in Roman Numeral — C
50 in Roman Numeral — L
20 in Roman Numeral — XX
4 in Roman Numeral — IV
So, 174 is written as CLXXIV in Roman numerals.
Find the sum of LXXXVII and LXXXVII.
A library has CDXX books and decides to distribute them equally among XXIV shelves. How many books will each shelf hold?
What is the product of XIV and XII?
Find the difference between CC and XXVI.
Write the Roman Numeral for 87 + 87 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.