Last updated on May 26th, 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 more. 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. 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 DCCLVIII to represent 758. Here, D is 500, CC is 200, L is 50, V is 5, and III is 3. 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, DCCLVIII → D + CC + L + V + III → 500 + 200 + 50 + 5 + 3 = 758
To write a large number, there are certain Roman Numerals that can be repeated up to three times. For instance, III → 3.
If a smaller numeral precedes a larger numeral 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 758 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 758 in Roman numerals using the expansion method. To write 758 in Roman Numerals, follow the steps:
Step 1: Break the number based on the place value. Place values are ones, tens, hundreds, etc. For 758, we write it as 700 + 50 + 8
Step 2: Converting the numbers into Roman Numerals
Step 3: Combining the Roman Numerals together. Therefore, 758 in Roman Numeral is DCC (700) + L (50) + VIII (8) = DCCLVIII
When writing a large number in Roman Numerals, we group the number. To write 758 in Roman Numerals, we group 758 as 700 + 50 + 8.
700 in Roman Numeral - DCC
50 in Roman Numeral - L
8 in Roman Numeral - VIII
So, 758 is written as DCCLVIII in Roman Numerals.
Students often 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.
Calculate the total distance traveled if you journeyed CDL miles on the first day and CCCVIII miles on the second day.
The total distance traveled is DCCLVIII
The total distance is the sum of the distances traveled on each day.
CDL = 450
CCCVIII = 308
450 + 308 = 758
758 in Roman Numerals is DCCLVIII
A library has a collection of MD books, and they plan to donate DCCXLII books to a local school. How many books will remain in the library?
The number of books remaining in the library is DCCLVIII
To find the remaining books, subtract the donated books from the total collection.
MD = 1500
DCCXLII = 742
1500 - 742 = 758
758 in Roman Numerals can be written as DCCLVIII
A marathon runner completes a race of DCC miles and then runs LVIII more miles as a cool down. Find the total distance covered.
The total distance covered is DCCLVIII
The total distance is the sum of the race distance and the cool down distance.
DCC = 700
LVIII = 58
700 + 58 = 758
758 in Roman Numerals is DCCLVIII
If a festival is planned for DCCL days, and it has already been running for II days, how many days remain?
The number of days remaining is DCCXLVIII
The remaining days are calculated by subtracting the days already passed from the total planned days.
DCCL = 750
II = 2
750 - 2 = 748
748 in Roman Numerals can be written as DCCXLVIII
Write the Roman Numeral for the sum of CCCXC and CCCLXVIII using the expansion method.
The Roman Numeral for the sum is DCCLVIII
Step 1: Convert the numbers CCCXC and CCCLXVIII into Arabic numbers.
CCCXC = 390
CCCLXVIII = 368
Step 2: Add the numbers together: 390 + 368 = 758
Step 3: Using the expansion method: 758 = 700 + 50 + 8 = DCCLVIII
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.