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Last updated on May 26th, 2025

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879 in Roman Numerals

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Roman numerals are a system of expressing numbers using symbols such as I, V, X, L, C, D, and M. They are used in various contexts, including royal titles, book names, and sequences. In this guide, we will discuss the Roman numeral system, its rules, and examples related to the number 879.

879 in Roman Numerals for Vietnamese Students
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What is 879 in Roman Numerals?

Royal titles often use Roman numerals, such as Henry VIII or Louis XIV. Have you noticed these symbols and wondered what they represent? They are Roman numerals, a numbering system used by ancient Romans.

 

The symbols I (1), V (5), X (10), L (50), C (100), D (500), and M (1000) enable counting. In Roman numerals, we use DCCCLXXIX to represent 879, where D is 500, CCC is 300, LXX is 70, and IX is 9. Let’s explore Roman numerals and how we write them.879 in roman numerals

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Basic Rules for 879 in Roman Numerals

Writing numbers in Roman numerals involves certain basic rules. Let's discuss some key rules to remember:

 

Rule 1: Addition Method

 

When a smaller numeral is placed after a larger numeral, their values are added. For example, DCCCLXXIX → D (500) + CCC (300) + LXX (70) + IX (9) = 879.

 

Rule 2: Repetition Method

 

Some Roman numerals can be repeated up to three times. For example, CCC → 300.

 

Rule 3: Subtraction Method

 

If a smaller numeral precedes a larger numeral, the smaller is subtracted from the larger. For example, IX → X (10) - I (1) = 9.

 

Rule 4: Limitation Rule

 

Symbols cannot be repeated more than three times, and certain symbols like V, L, and D cannot be repeated. For example, 10 is written as X, not VV.

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How to Write 879 in Roman Numerals

Let’s learn how to write 879 in Roman numerals using different methods:

 

  • By Expansion Method
  • By Grouping Method
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879 in Roman Numerals by Expansion Method

The expansion method breaks down a number based on place value into hundreds, tens, and ones. Here's how to write 879 in Roman numerals using this method:

 

Step 1: Break the number into its place values: 800 + 70 + 9.

 

Step 2: Convert each part into Roman numerals: 800 → DCCC 70 → LXX 9 → IX

 

Step 3: Combine them: DCCC + LXX + IX = DCCCLXXIX.

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879 in Roman Numerals by Grouping Method

When writing a large number in Roman numerals, we group the number. To write 879 in Roman numerals, group it as 800 + 70 + 9:

 

  • 800 in Roman Numerals - DCCC
     
  • 70 in Roman Numerals - LXX
     
  • 9 in Roman Numerals - IX

 

So, 879 is written as DCCCLXXIX in Roman numerals.

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Common Mistakes and How to Avoid Them in 879 Roman Numerals

When writing numbers in Roman numerals, students often make mistakes. Here are some common errors and how to avoid them:

Mistake 1

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Errors in Repetition Method

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Beginners may be confused by the repetition method, which states that Roman numerals cannot be repeated more than three times, and symbols like V, L, and D cannot be repeated.

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879 in Roman Numerals Examples

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Problem 1

A historian wants to split a collection of DCCCXC ancient coins evenly among IX museums. How many coins does each museum receive?

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Each museum receives XCVIII coins.

Explanation

To find the number of coins each museum receives, divide the total number of coins by the number of museums.

DCCCXC = 890

IX = 9

DCCCXC / IX = 890 / 9 = 98

98 in Roman Numerals is XCVIII.

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Problem 2

A library received CMXLVII books and decided to donate them to V schools equally. How many books does each school get?

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Each school receives CLXXXIX books.

Explanation

To find the number of books each school receives, divide the total number of books by the number of schools.

CMXLVII = 947

V = 5

CMXLVII / V = 947 / 5 = 189

189 in Roman Numerals is CLXXXIX.

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Problem 3

Calculate the total cost if a merchant buys DCCLXXXIX items for IX coins each.

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The total cost is DCCCI.

Explanation

To find the total cost, multiply the number of items by the cost per item.

DCCLXXXIX = 789

IX = 9

789 × 9 = 7101

7101 in Roman Numerals is DCCCI.

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Problem 4

A sculptor created a statue weighing DCCCXL kg and later added more material weighing XXXIX kg. What is the statue's total weight now?

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The total weight of the statue is DCCCLXXIX kg.

Explanation

To find the total weight, add the weights of the original and added materials.

DCCCXL = 840

XXXIX = 39

840 + 39 = 879

879 in Roman Numerals is DCCCLXXIX.

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Problem 5

Write the Roman Numeral representation for the subtraction of CM from DCCCLXXIX using the expansion method.

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The Roman numeral for DCCCLXXIX - CM is DCCCLXXIX.

Explanation

Step 1: Convert the numbers into Roman numerals.

CM = 900

DCCCLXXIX = 879

Step 2: Subtract the numbers.

879 - 900 = -21 (negative) Since Roman numerals do not represent negative numbers, the subtraction cannot be represented traditionally.

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FAQs on 879 in Roman Numerals

1.What is 800 in Roman numerals?

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2.How to write 879 in Roman numerals?

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3.What is 70 in Roman Numerals?

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4.Is DCCCLXXIX a prime number?

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5.What are the multiples of 879?

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Important Glossaries for 879 in Roman Numerals

  • Addition Rule: This method is used when a larger numeral is followed by a smaller one, resulting in their values being added. For example, DCCCLXXIX = 500 + 300 + 70 + 9 = 879.
     
  • Grouping Method: Numbers are grouped based on their place value, then converted into Roman numerals. For example, 879 = 800 + 70 + 9 = DCCCLXXIX.
     
  • Repetition Rule: Certain symbols (I, X, C, M) in the Roman numeral system can be repeated up to three times. For example, CCC = 300.
     
  • Subtraction Rule: When a smaller numeral precedes a larger numeral, it is subtracted from the larger. For example, IX = 10 - 1 = 9.
     
  • Limitation Rule: Some symbols, such as V, L, and D, cannot be repeated. For example, 10 is X, 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.

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Fun Fact

: She loves to read number jokes and games.

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