Roman numerals were a number system used in ancient Rome. Instead of digits like 1, 2, 3, Roman numerals used letters from the Latin alphabet. Each letter had a fixed value:

• I = 1
• V = 5
• X = 10
• L = 50
• C = 100
• D = 500
• M = 1000

To form a number, these symbols are combined using addition and subtraction rules:

• If a smaller value comes after a bigger one, the values are added.
  Example: VI = 5 + 1 = 6
• If a smaller value comes before a bigger one, it is subtracted.
  Example: IV = 5 - 1 = 4

Now, for XXVIII:

• X + X = 10 + 10 = 20
• V + I + I + I = 5 + 1 + 1 + 1 = 8

So, XXVIII = 20 + 8 = 28

What is XXVIII Roman Numeral Value?

The Roman numeral XXVIII represents the number 28. Roman numerals were used in ancient Rome and are still taught today as part of number systems. Instead of using the numbers 1, 2, 3, etc., Roman numerals use specific letters from the Latin alphabet. The basic symbols are: I = 1, V = 5, and X = 10. These letters are combined to form different numbers. In the case of XXVIII, it is made up of X + X + V + I + I + I. Here, the two X's represent 10 + 10, the V stands for 5, and the three I's add up to 3. So, when we add them all together, we get 10 + 10 + 5 + 1 + 1 + 1 = 28. That’s why XXVIII equals 28 in Roman numerals. This method of combining symbols by adding their values is known as the Roman numeral addition method. In questions or exams, you might be asked to convert XXVIII to a number (which is 28), or write the number 28 in Roman numerals (which is XXVIII).

Value of XXVIII Roman can be calculated using the roman numeral addition method. First, we must write the numerical value of each character or letter. By adding these digits, the value of XXVIII Roman numerals is computed. We can calculate XXVIII Roman Numeral in a number of ways as mentioned below:

• XXVIII Roman Numeral by Expansion Method
• XXVIII Roman Numeral by Grouping Method

Calculate XXVIII Roman Numeral Value by Expansion Method

To use this method, calculate the value of each numeral and add it to find the final value.

Value of XXVIII Roman numeral = 10+10+8 = 28

Calculate XXVIII Roman Numeral Value by Grouping Method

In this system, the numerical values of groups of letters are considered for addition.

Value of XXVIII Roman numeral = (XX) + (VIII) = 20 + 8 = 28

This was done for XXVIII Roman Numerals in numbers. You can follow the same steps for any number.

Rules for Roman Numerals

All roman numerals are made up of a set of seven symbols. These combinations adhere to four key guidelines. There are four important rules to follow for the Roman numeral system.

Rule 1: When a smaller symbol is after a greater symbol, it’s added.

For example,

XI = 10 + 1 = 11

Rule 2: If a symbol comes after itself, it’s added.

For example,

XX = 10 + 10 = 20

CCLX = 100 + 100 + 50 + 10 = 260

Rule 3: When a smaller symbol appears before a greater symbol, it is subtracted.

For example,

IX = 10 – 1 = 9

XL= 50 – 10 = 40

CM = 1000 – 100 = 900

Rule 4: The same symbol cannot be used more than three times in a row.

For example,

XXX = 10 + 10 + 10 = 30, but 40 is not XXXX. 40 is XL.

CCC = 100 + 100 + 100 = 300, but 400 is not CCCC. 400 is CD.

How to Convert XXVIII Roman Numeral to Number

We can convert XXVIII roman numerals to numbers by using a few simple rules. Take a close look at this roman numeral.

XXVIII

Find the value of each symbol in a roman numeral and then add or subtract these values to convert them to digits.

Let’s give it a shot right now!

Let’s start by determining the value of each symbol.

X – 10

X – 10

VIII – 8

This is due to the fact that such numbers must be added (Rule 1).

Rule 1 is repeated once more:

Rule 1: When a smaller symbol is after a greater symbol, it’s added.

Let’s now add and subtract the values.

XXVIII = 10+10+8 = 28

So, what is this roman numeral’s value?

Correct!

XXVIII = 28

XXVIII in Numbers 

The Roman numeral XXVIII stands for the number 28. We can find this using two simple methods:

Method 1: Break it Down Letter by Letter
Take each Roman letter and write its number value:

X = 10
V = 5
I = 1

Now, add them all:
XXVIII = X + X + V + I + I + I = 10 + 10 + 5 + 1 + 1 + 1 = 28

Method 2: Group and Add
Group the numerals to make it easier:

XX = 20
VIII = 8

Add the two groups:
XXVIII = 20 + 8 = 28

So, the value of XXVIII is 28.

How to write XXVIII Roman Numeral in Words

To write XXVIII Roman Numerals we must first convert it into numbers. We have already done that above. We know that XXVIII Roman Numeral is number 28. Now let’s write it into words. First, find out the places of the digits.

Tens: 2

Ones: 8

Now, we will expand the number by adding a 0 to tens place digit and its addition with the digit in one place.

Thus, we get the expanded form of XXVIII Roman Numerals in numbers as:

20 + 8.

Now, we name each number. We know that 20 means twenty and 8 means eight. Therefore, XXVIII Roman Numerals in words is twenty-eight. This was done for XXVIII Roman Numerals in words. You can follow the same steps for any number.

Numbers Related to XXVIII Roman Numerals

Below are the numbers which are close to XXVIII. The right column shows how each roman numeral adds up to the total.

XXVIII Roman Numerals Examples

Example 1: Write the Hindu-Arabic numeral for MCMIV.

Solution: We know that,

M is a thousand, CM is nine hundred and IV is four

Hence, MCMIV is written as One thousand nine hundred and four or 1904.

Example 2: How would the number ‘473’ be written using Roman Numerals?

Options:
A) IVVIIIII
B) DCLXXIII
C) CDLXXIII
D) CCCCLXXIII

Solution:
To write 473 in Roman numerals, we break it down as follows:

• 400 = CD
• 70 = LXX
• 3 = III

So, 473 = CD + LXX + III = CDLXXIII

Correct Answer: C) CDLXXIII

Example 3: What is the value of XII+XIV+XXX? Write in Roman numerals.

Solution: When a numerical is followed by a lower-valued numeral, the two are added. In addition, if a lower value numeral is followed by a higher value numeral, the lower value numeral is deducted.

We also know that when a numeral is repeated, the number is multiplied by the number of times it is multiplied.

So, XII = 10+1+1 = 12

XIV = 10+5-1 = 14

XXX = 10+10+10 = 30

So, 12 + 14 + 30 = 56

50 is represented by L, and 6 is represented as VI.

So, XII+XIV+XXX = LVI

Hope this article on XXVIII Roman Numerals was informative. Get some practice of the same on our free Testbook App. Download Now!