87 in Roman Numerals

Number 87 in Roman numerals is written as LXXXVII. To convert 87, we first express it in expanded form as: 87 = 50 + 10 + 10 = 10 + 5 + 1 + 1 and then replace all the numerical values with Roman symbols as: L + X + X + X + V + I + I = LXXXVII. Understanding how to read and write numbers like 87 in Roman numerals will help to improve your logical thinking. By learning to combine larger values through addition and subtraction you can easily develop the reasoning skills. The study of LXXXVII is not only a mathematical skill but it is also a link that introduces you to ancient numeral systems, making number learning more engaging and meaningful in everyday life.

On this page, we will learn how to write 87 in Roman Numerals, along with solving sample problems related to Roman numerals. It will also help you to understand the rules applied in writing Roman numerals.

 

Table of Contents

• How to Write 87 in Roman Numerals?
• Roman Numerals for Numbers Related to 87
• Rules to write Roman Numerals
• Solved Examples on 87 in Roman Numerals
• Practice Questions on 87 in Roman Numerals

 

How to Write 87 in Roman Numerals?

87 can be written in Roman numerals by using the following method:

Step 1: To write 87 in Roman numerals, first expand it into parts as:

 87 = 50 + 10 + 10 + 10 + 5 + 1 + 1

Step 2: Now, replace all the numbers with Roman numerals:

87 = L + X + X + X + V + I + I

Step 3: Write them together as: 87 = LXXXVII

 

Roman Numerals for Numbers Related to 87

Here are some numbers around 87 and their Roman numeral forms:

85 in Roman numerals = LXXXV = 50 + 10 + 10 + 10 + 5

86 in Roman numerals = LXXXVI = 50 + 10 + 10 + 10 + 5 + 1

87 in Roman numerals =  LXXXVII = 50 + 10 + 10 + 10 + 5 + 1 + 1

88 in Roman numerals = LXXXVIII = 50 + 10 + 10 + 10 + 5 + 1 + 1 + 1

89 in Roman numerals =  LXXXIX = 50 + 10 + 10 + 10 + (10 -1)

 

Rules of Writing Roman Numerals

• Repetition Rule:
  i. A symbol can be repeated only 3 times.
  Example: XX = 20, CC = 200
  
  ii. A symbol is added to itself if repeated.
  Example: III = 3, XXX = 30

• Subtractive Rule:
  If a smaller symbol precedes a larger one, we subtract.
  Example: IX = 10 - 1 = 9

• Additive Rule: If a smaller symbol comes after a bigger one, we add.
  Example: VI = 5 + 1 = 6

• Symbols V (5), L (50), and D (500) are never repeated and never subtracted.

• I can be subtracted only from V and X and X can be subtracted only from L, C, and M.

 

Solved Examples on 87 in Roman Numerals

Example 1: Find the value of 10 + (80 - 3) in Roman numerals.

Solution: 

By solving the given expression, we get, 

10 + (80 - 3) = 10 + 77 = 87

Now write the numbers in Roman numerals:

X + (LXXX - III) = X + LXXVII = LXXXVII

 

Example 2: Determine the difference between LXXXVII and XXXVII  in Roman numerals.

Solution: 

To find the difference between LXXXVII and XXXVII, first write them in numbers as: 

LXXXVII = L + XXX + VII = 87 and XXXVII = XXX + VII = 37

Now solve it, LXXXVII - XXXVII = 87 - 37 = 50

LXXXVII - XXXVII = L

 

Example 3: What should be added to LXXXV to get LXXXVII?

Solution: 

We know that, LXXXVII - LXXXV = 87 - 85 = 2

So, we need to add 2 to 85 to get 87 as LXXXV + II = LXXXVII.

 

Practice Questions on 87 in Roman Numerals

1. Write 87 in Roman numerals.
2. Add L (50) and XXXVII (37). Write your answer in Roman numerals.
3. Subtract 13(XIII) from C(100) and express the results in Roman numerals.
4. Write the next three numbers after 87 in Roman numerals.
5. Convert LXXXVII Roman numerals into numbers.