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 discuss Roman Numerals, rules, and examples.
Royal titles, such as Henry I, Henry II, and so on, often use Roman Numerals. 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., but as life became more 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 DCXXVIII to represent 628, where D is 500, C is 100, XX is 20, 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. For example, VIII → V + III → 5 + 3 = 8
To write a large number, certain Roman Numerals can be repeated up to 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. 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, and 8 is written as VIII, not IIIIIIII.
Let’s now learn how to write 628 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 628 in Roman numerals using the expansion method. To write 628 in Roman Numerals, follow these steps:
Step 1: Break the number based on the place value. Place values include ones, tens, hundreds, etc. For 628, we write it as 600 + 20 + 8
Step 2: Convert the number into Roman Numerals:
600 in Roman Numerals - DC
20 in Roman Numerals - XX
8 in Roman Numerals - VIII
Step 3: Combine the Roman Numerals together. Therefore, 628 in Roman Numerals is DC (600) + XX (20) + VIII (8) = DCXXVIII
When writing a large number into Roman Numerals, we group the number. To write 628 in Roman Numeral, we group 628 as 600 + 20 + 8
600 in Roman Numerals - DC
20 in Roman Numerals - XX
8 in Roman Numerals - VIII
So, 628 is written as DCXXVIII 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.
A historian is cataloging ancient artifacts and finds two chests labeled CCCXIV and CCCXIV. What is the total number of artifacts in the two chests?
The total number of artifacts in the two chests is DCXXVIII.
To find the total number of artifacts, we add the contents of the two chests. CCCXIV = 314 Therefore, 314 + 314 = 628. 628 in Roman Numerals is DCXXVIII.
An archaeologist discovers a stone with the inscription DCXXVIII. If he divides the stone into four equal sections, how many portions will each section represent?
Each section will represent CLVII.
To find the number of artifacts each section represents, divide 628 by 4.
DCXXVIII = 628
628 / 4 = 157
157 in Roman numerals can be written as CLVII.
A museum exhibits two sets of coins, one labeled CD and another labeled CCXXVIII. What is the combined number of coins in Roman numerals?
The combined number of coins is DCXXVIII.
To find the combined number of coins, add the two sets together.
CD = 400
CCXXVIII = 228
400 + 228 = 628
628 in Roman Numerals is DCXXVIII.
A mathematician is solving a complex equation and arrives at the result of DCXXVIII. If the equation was initially subtracted by CCCXIV, what was the original number?
The original number was CMXLII.
To find the original number before subtraction, add the subtracted value to the result. DCXXVIII = 628
CCCXIV = 314
628 + 314 = 942
942 in Roman Numerals is CMXLII.
Write the Roman Numeral for 500 + 100 + 28 using the expansion method.
The Roman numeral for 500 + 100 + 28 is DCXXVIII.
Step 1: Break down each number into its Roman numeral components.
500 = D
100 = C
28 = XXVIII
Combine these to get 500 + 100 + 28 = 628 In Roman numerals, this is written as DCXXVIII.
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.