80 in Roman Numerals

80 in Roman Numerals is written as LXXX. Roman numerals are an old number system that utilizes letters from the Latin alphabet to express figures. Every letter is given some value, and the numbers are created by adding or subtracting these symbols.

 

In this article, we will learn how to write 80 in Roman numerals, understand the primary rules of Roman numerals, and solve examples to gain a clear understanding.

 

Table of Contents

• How to Write 80 in Roman Numerals?
• Basic Rules to Write Roman Numerals
• Roman Numerals Associated with the Number 80
• Solved Examples on Roman Numerals
• Conclusion
• FAQs on 80 in Roman Numerals

 

How to Write 80 in Roman Numerals

To write 80 in Roman numerals, one needs to comprehend the symbols of tens and units. The dominant symbols in Roman numerals are: 

I = 1 

V = 5 

X = 10 

L = 50 

C = 100

D = 500

M = 1000

 

For the numbers between 50 and 100, we take L for 50, and then we add X (10) multiple times in order to get 80.

 

Step-by-step:

 

L = 50

XXX = 10 + 10 + 10 = 30

Add them up: 50 + 30 = 80

Therefore, 80 in Roman numerals = LXXX

 

Basic Roman Numeral Rules

• A symbol is added by itself when it is repeated.

Example: II = 2, XX = 20, XXX = 30

• A symbol can be repeated a maximum of 3 times.

Example: XXX = 30, CCC = 300

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

• If a smaller symbol follows a larger one, we add.

Example: VI = 5 + 1 = 6

• If a smaller symbol precedes a larger one, we subtract.

Example: IV = 5 – 1 = 4

• Symbols V, L, and D are never subtracted.

I can only be subtracted from V and X.

Also, X can be subtracted only from L and C.

 

Roman Numerals Based on the Number 80

The number 80 is represented as LXXX in Roman Numerals, which is equivalent to 50 + 10 + 10 + 10. We may express numbers slightly higher or lower than 80 with combinations:

79 in Roman Numerals = LXXIX (50 + 10 + 10 + 9)

80 in Roman Numerals = LXXX (50 + 10 + 10 + 10)

81 in Roman Numerals = LXXXI (50 + 10 + 10 + 10 + 1)

85 in Roman Numerals = LXXXV (50 + 10 + 10 + 10 + 5)

90 in Roman Numerals = XC (100 – 10)

 

This indicates how Roman numerals are added together to make numbers near 80.

 

80 in Roman Numerals - Examples

Example 1: Write the sum of LXX (70) and X (10) in Roman numerals

Solution:

LXX = 70 and X = 10

Adding them gives: 70 + 10 = 80

In Roman numerals, 80 = LXXX

 

Example 2: Add what to LXXX in order to get XC?

Solution:

LXXX = 80 and XC = 90

Subtract: 90 – 80 = 10

10 in Roman numerals is X

Thus, LXXX + X = XC

 

Example 3: What is the difference between LXXX and L?

Solution:

LXXX = 80 and L = 50

Subtract: 80 – 50 = 30

30 in Roman numerals = XXX

So, LXXX – L = XXX

 

Example 4: Multiply L (50) by 2 in Roman numerals

Solution:

L = 50

50 × 2 = 100

100 in Roman numerals = C

So, L × 2 = C

 

Conclusion

The Roman numeral of 80 is LXXX. Roman numerals employ the use of letters and a set of addition or subtraction rules to denote numbers. Through the acquisition of these rules and practicing examples, students are in a position to read and write numbers like 79 (LXXIX), 80 (LXXX), or 90 (XC) effortlessly.

 

Frequently Asked Questions on 80 in Roman Numerals

 

1. What are Roman numerals?

Answer: Roman numerals is a very old numbering system where letters such as I, V, X, L, C, D, and M are used instead of digits. 

2. Is LXXX equal to 80 in Roman numerals?

Answer: Yes, LXXX is written for 80 in Roman numerals.

3. How do we write numbers greater than 50 in Roman numerals?

Answer: Numbers over 50 are written by beginning with L (50) and then adding X (10) or I (1) where necessary.

 

4. Is L subtracted from other symbols?

Answer: No, symbols L, V, and D are never subtracted in Roman numerals.

 

Learn 80 in Roman Numerals and other maths concepts at Orchids The International School.