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123 LearnersLast updated on February 23rd, 2025
720 in Roman Numerals
Roman numerals are a way of expressing numbers using specific symbols: I, V, X, L, C, D, and M. They are often used in contexts like royal titles, book names, and sequences. Here we will be discussing Roman numerals, their rules, and examples.
What is 720 in Roman Numerals?
Royal titles, such as Henry I, Henry II, and so on, use Roman numerals. Have you noticed these names and wondered what the symbols (I and II) represent?
They are Roman numerals. In ancient times, people counted using fingers, sticks, bones, etc. As life became more complex, a standard form was required for counting. Ancient Romans used 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 for counting.
In Roman numerals, we use DCCXX to represent 720, where D is 500, CC is 200, and XX is 20. Let's learn more about Roman numerals and how we write them.
Basic Rules for 720 in Roman Numerals
There are certain basic rules for writing a number in Roman numerals. In this section, let's discuss some rules that need to be remembered.
Rule 1: Addition Method
The addition method is used when a smaller number is placed after a larger number. For example, DCCXX → D + CC + XX → 500 + 200 + 20 = 720.
Rule 2: Repetition Method
To write larger numbers, certain Roman numerals can be repeated up to three times. For example, XX → 20.
Rule 3: Subtraction Method
When a smaller numeral precedes a larger numeral, the smaller is subtracted from the larger. For example, IX → X - I → 10 - 1 = 9.
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, we write 10 as X, not VV.
How to Write 720 in Roman Numerals
Let's now learn how to write 720 in Roman numerals using different methods.
720 in Roman Numeral by Expansion Method
In this method, the number is broken down based on its place value.
Step 1: Break the number based on place value: 700 + 20.
Step 2: Convert each part into Roman numerals:
- 700 in Roman numerals — DCC
- 20 in Roman numerals — XX
Step 3: Combine them: Therefore, 720 in Roman numerals is DCCXX.
720 in Roman Numeral by Grouping Method
To write 720 in Roman numerals, we group it as 700 + 20.
- 700 in Roman numerals — DCC
- 20 in Roman numerals — XX
So, 720 is written as DCCXX in Roman numerals.
Numbers Related to 720 in Roman Numerals
Roman numerals follow a certain pattern. Here are some numbers related to 720:
Common Mistakes and How to Avoid Them in 720 Roman Numerals
720 in Roman Numerals Examples
Problem 1
A historian is cataloging artifacts and has a total of DCCXX items. She decides to divide them equally into XL groups for a detailed study. How many items will be in each group?
Explanation
Problem 2
Calculate the total value when two ancient scrolls, valued at CCCLX and CCCLX, are combined.
Explanation
Problem 3
A collector has DCCXX coins and decides to display them in groups of XXIV. How many full groups can she form?
Explanation
Problem 4
A merchant has two sets of goods, one weighing CCC and the other weighing CDXX. What is their total weight together?
Explanation
Problem 5
Write the Roman Numeral for 500 + 220 using the expansion method.
Explanation
FAQs on 720 in Roman Numerals
1.What is 700 in Roman numerals?
2.How to write 720 in Roman numerals?
3.What is 750 in Roman Numerals?
4.Is 720 a prime number?
5.What are the multiples of 720?
Important Glossaries for 720 in Roman Numerals
- Addition rule: When a smaller numeral follows a larger numeral, the values are added. Example: DCCXX = D + CC + XX = 500 + 200 + 20 = 720.
- Grouping method: Numbers are grouped based on place value and converted to Roman numerals. Example: 720 = 700 + 20 = DCCXX.
- Repetition rule: Certain symbols (I, X, C, M) can be repeated up to three times. Example: XX = 20.
- Subtraction rule: Smaller numerals before larger ones indicate subtraction. Example: IV = 4 (5 - 1).
- Limitation rule: Some symbols like V, L, and D cannot be repeated. Example: X = 10, not VV.
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Hiralee Lalitkumar Makwana
About the Author
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.
Fun Fact
: She loves to read number jokes and games.
