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Last updated on February 23rd, 2025
Roman numerals are a system of numerical notation used in ancient Rome, employing combinations of letters from the Latin alphabet: I, V, X, L, C, D, and M. Roman Numerals appear in various contexts like royal titles, book names, sequences, etc. Here we will discuss Roman numerals, their rules, and examples.
Royal titles such as Henry I, Henry II, etc., often use Roman numerals. Have you noticed these symbols and wondered what they represent? These are Roman numerals.
Initially, people counted using fingers, sticks, bones, etc. As life became more complex, a standardized system was needed. Ancient Romans used Roman numerals: I (1), V (5), X (10), L (50), C (100), D (500), and M (1000).
In Roman numerals, we use CDXXVI to represent 426, where CD is 400, XX is 20, and VI is 6. Let's learn more about Roman numerals and how to 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 a larger number. For example, VI → V + I → 5 + 1 = 6
Certain Roman numerals can be repeated up to three times. For example, XXX → 30.
If a smaller number precedes a larger number, it is subtracted. For example, IV → V - I → 5 - 1 = 4
Symbols cannot be repeated more than three times, and symbols like V, L, and D cannot be repeated. For example, 10 is not VV; it is X. For 8, we write VIII, not IIIIIIII.
Let’s now learn how to write 426 in Roman numerals. Follow these methods to write the number in Roman numerals.
In the expansion method, a number is broken down based on place value. In this section, we will learn how to write 426 in Roman numerals using the expansion method. To write 426 in Roman numerals, follow these steps:
Step 1: Break the number based on place value: hundreds, tens, and ones. For 426, we write it as 400 + 20 + 6.
Step 2: Convert each number into Roman numerals:
400 in Roman numerals - CD
20 in Roman numerals - XX
6 in Roman numerals - VI
Step 3: Combine the Roman numerals: Therefore, 426 in Roman numerals is CD (400) + XX (20) + VI (6) = CDXXVI.
When writing a large number into Roman numerals, we group the number. To write 426 in Roman numerals, group as 400 + 20 + 6.
So, 426 is written as CDXXVI in Roman numerals.
A historian found a document stating that a Roman army consisted of CDXXVI soldiers. If they were divided into VI equal groups, how many soldiers were in each group?
A Roman merchant received a shipment of CD books. He already had XXVI books in his shop. How many books does he have in total now?
A Roman theater has CDXXVI seats. If CCCXCIX seats were occupied during a play, how many seats were left empty?
Convert the year 426 A.D. into Roman numerals.
A collection of Roman coins includes CDXXVI denarii. If each denarius is worth V sestertii, what is the total value of the collection in sestertii?
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.