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 so on. Here we will discuss Roman numerals, rules, and examples.
Royal titles, such as Henry I, Henry II, and so on, use Roman numerals. Have you noticed the names and wondered what these symbols (I and II) represented? Those are the Roman numerals.
Earlier people counted using fingers, sticks, bones, etc. When life became complex, a standard form was required. 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 DCXXVII to represent 627, where D is 500, C is 100, X is 10, and VII is 7. 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 a smaller number is placed after the larger number. For example, DCXXVII → D + C + X + X + V + I + I → 500 + 100 + 10 + 10 + 5 + 1 + 1 = 627
To write a large number, certain Roman numerals can be repeated up to three times. For example, 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.
Let’s now learn how to write 627 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 627 in Roman numerals using the expansion method. To write 627 in Roman numerals, follow the steps,
Step 1: Break the number based on the place value. Place values are ones, tens, hundreds, etc. For 627, we write it as 500 + 100 + 20 + 7
Step 2: Converting the number into Roman numerals
500 in Roman Numeral - D
100 in Roman Numeral - C
20 in Roman Numeral - XX
7 in Roman Numeral - VII
Step 3: Combine the Roman numerals together. Therefore, 627 in Roman numerals is D (500) + C (100) + X (10) + X (10) + V (5) + I (1) + I (1) = DCXXVII
When writing a large number into Roman numerals, we group the number. To write 627 in Roman numerals, we group 627 as 500 + 100 + 20 + 7
500 in Roman Numeral - D
100 in Roman Numeral - C
20 in Roman Numeral - XX
7 in Roman Numeral - VII
So, 627 is written as DCXXVII 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.
Calculate the sum of DCXXVII and LXXIII.
The sum of DCXXVII and LXXIII is DCC.
DCXXVII is 627 and LXXIII is 73. The sum of DCXXVII and LXXIII is 627 + 73 = 700. 700 in Roman numerals is DCC.
A historian is dividing MCMXXXVI ancient coins among CCCXXVII collectors. How many coins does each collector get if the coins are distributed equally?
Each collector receives VI coins.
To find the number of coins each collector receives, divide the total number of coins by the number of collectors.
MCMXXXVI / CCCXXVII = 1936 / 327 = 5.92, which we round down to 6. Therefore, each collector receives VI coins.
Determine the difference between CM and DCXXVII.
The difference between CM and DCXXVII is CCLXXIII.
To find the difference, subtract DCXXVII from CM. CM is 900 and DCXXVII is 627. The difference is 900 - 627 = 273. 273 in Roman numerals is CCLXXIII.
Find the product of DCXXVII and II.
The product of DCXXVII and II is MCCLIV.
The product of two numbers is found by multiplying them. DCXXVII is 627 and II is 2. The product of 627 × 2 = 1254. 1254 in Roman numerals is MCCLIV.
Write the Roman numeral for the sum of 627 and 400 using the expansion method.
The Roman numeral for the sum of 627 and 400 is MXXVII.
Step 1: Convert the numbers 627 and 400 into Roman numerals. 627 is DCXXVII, and 400 is CD.
Step 2: Add the numbers together: 627 + 400 = 1027. Step 3: Using the expansion method, write 1027 as 1000 + 20 + 7, which is MXXVII.
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.