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Last updated on February 21st, 2025
Roman numerals are a system of expressing numbers using symbols. The symbols I, V, X, L, C, D, and M are used to represent numbers. Roman Numerals are commonly found in royal titles, book names, sequences, and more. Here, we will discuss Roman Numerals, the rules for writing them, and provide examples.
Royal titles, such as Henry I, Henry II, and so on, often use Roman Numerals. Have you noticed these symbols (I and II) and wondered what they represent? Those are Roman Numerals. In ancient times, people used fingers, sticks, bones, etc., for counting. As life became more complex, a standard form of counting was needed. Ancient Romans developed the Roman Numeral system for this purpose. I (1), V (5), X (10), L (50), C (100), D (500), and M (1000) are the symbols used.
The number 220 in Roman Numerals is written as CCXX, where C stands for 100 and X stands for 10. Let's learn more about Roman numerals and how they are written.
There are some basic rules to remember when writing numbers in Roman Numerals. Let's discuss these rules:
Rule 1: Addition Method
When a smaller numeral is placed after a larger numeral, their values are added. For example, XX → X + X → 10 + 10 = 20.
Rule 2: Repetition Method
Some Roman Numerals can be repeated up to three times to denote a number. CCC → 300.
Rule 3: Subtraction Method
When a smaller numeral precedes a larger numeral, the smaller value is subtracted from the larger value. For example, XC → C - X → 100 - 10 = 90.
Rule 4: Limitation Rule
Symbols cannot be repeated more than three times, and some symbols like V, L, and D cannot be repeated. For example, 50 is L, not LL.
Let's learn how to write 220 in Roman Numerals using different methods:
In the expansion method, the number is broken down based on place value.
To write 220 in Roman Numerals, follow these steps:
Step 1: Break down the number based on place value. For 220, it is 200 + 20.
Step 2: Convert each part into Roman Numerals:
200 in Roman Numerals is CC.
20 in Roman Numerals is XX.
Step 3: Combine the Roman Numerals: CC + XX = CCXX.
For the grouping method, group the number based on its components.
For 220, group it as 200 and 20:
200 is CC in Roman Numerals.
20 is XX in Roman Numerals.
So, 220 is written as CCXX in Roman Numerals.
Find the product of XX and XI.
An artist has CXX canvas sheets and wants to distribute them equally among V painters. Find the number of canvas sheets each painter will receive.
Calculate the sum of C and CXX.
What is the difference between CCL and XXX?
Write the Roman Numeral for 150 + 70 using the expansion method.
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.