Last updated on May 26th, 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 CXLVIII to represent 148, here C is 100, XL is 40, and VIII is 8. 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, then it is the addition method. For example, VIII → V + I + I + I → 5 + 1 + 1 + 1 = 8
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, it is a subtraction method. For example, XL → L - X → 50 - 10 = 40
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 LL for 100 instead we use C, and 8 we write as VIII not IIIIIIII.
Let’s now learn how to write 148 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 148 in Roman numerals using the expansion method.
To write 148 in Roman Numerals, follow the steps:
Step 1: The number is broken based on the place value. Place values are ones, tens, hundreds, etc.
For 148, we write it as 100 + 40 + 8
Step 2: Converting the number into Roman Numerals
100 in Roman Numeral — C
40 in Roman Numeral — XL
8 in Roman Numeral — VIII
Step 3: Combining them Roman Numerals together.
Therefore, 148 in Roman Numeral is C (100) + XL (40) + VIII (8) = CXLVIII
When writing a large number into Roman Numeral we group the number.
To write 148 in Roman Numeral, we group 148 as 100 + 40 + 8
100 in Roman Numeral — C
40 in Roman Numeral — XL
8 in Roman Numeral — VIII
So, 148 is written as CXLVIII in Roman Numerals.
Students make mistakes when writing a number in Roman Numerals. To master Roman Numerals we can learn a few common mistakes and the ways to avoid them.
A historian is archiving CXCVIII ancient artifacts and wants to distribute them equally into XXVIII collections. Find the number of artifacts in each collection.
The number of artifacts in each collection is VII.
To find the number of artifacts per collection, divide the total number of artifacts by the number of collections.
- CXCVIII = 198
- XXVIII = 28
Therefore, 198 / 28 = 7.
7 in Roman numerals can be written as VII.
Calculate the combined value of XCVI and LII.
The combined value of XCVI and LII is CXLVIII.
The sum is the result of adding two numbers.
- XCVI = 96
- LII = 52
96 + 52 = 148.
148 in Roman numerals is CXLVIII.
The combined value of XCVI and LII is CXLVIII.
An architect has a plan to build CLX houses and has currently finished XII. How many more houses does the architect need to complete?
The architect needs to complete CXLVIII more houses.
The difference is the number of houses still to be built.
- CLX = 160
- XII = 12
160 - 12 = 148.
148 in Roman numerals is CXLVIII.
The architect needs to complete CXLVIII more houses.
What is the product of XIV and XI?
The product of XIV and XI is CLIV.
The product is the result of multiplying two numbers.
- XIV = 14
- XI = 11
14 × 11 = 154.
154 in Roman numerals is CLIV.
The product of XIV and XI is CLIV.
Write the Roman numeral for 148 using the expansion method.
The Roman numeral for 148 is CXLVIII.
First, express the number in terms of hundreds, tens, and units:
- 100 + 40 + 8 = C + XL + VIII
Thus, 148 is written as CXLVIII 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.