128 in Roman Numerals

Royal titles, such as Henry I, Henry II, and so on, often use Roman numerals. These symbols (I and II) represent numbers. Earlier, people used to count using fingers, sticks, bones, etc. As life became more complex, a standard form was required to count. Ancient Romans used the Roman numeral system to count. 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 CXXVIII to represent 128, where C is 100, XX is 20, and VIII is 8. Let’s learn more about Roman numerals and how we write them.

There are certain basic rules for writing a number in Roman numerals. In this section, let’s discuss some basic rules that need to be remembered when writing a number in Roman numerals.

Rule 1: Addition Method

The addition method is used when the smaller number is placed after the larger number. For example, VIII → V + I + I + I → 5 + 1 + 1 + 1 = 8.

Rule 2: Repetition Method

To write a large number, certain Roman numerals can be repeated up to three times. For instance, XXX → 30.

Rule 3: Subtraction Method

If a smaller number precedes a larger number in Roman numerals, we subtract the smaller number from the larger number. For example, IX → X - I → 10 - 1 = 9.

Rule 4: Limitation Rule

The symbols cannot be repeated more than three times, and some symbols like V, L, and D cannot be repeated. For example, we won't write VV for 10; instead, we use X, and 8 is written as VIII, not IIIIIIII.

Let’s now learn how to write 125 in Roman numerals. Follow these methods to write the number in Roman numerals.

• By Expansion Method

• By Grouping Method

In the expansion method, based on the place value, the number is broken down. In this section, we will learn how to write 128 in Roman numerals using the expansion method.

To write 128 in Roman numerals, follow these steps:

Step 1: Break the number based on the place value into hundreds, tens, and ones.

For 128, we write it as 100 + 20 + 8.

Step 2: Convert each component into Roman numerals.

 100 in Roman numerals is C.
 20 in Roman numerals is XX.
 8 in Roman numerals is VIII.

Step 3: Combine the Roman numerals together.

Therefore, 128 in Roman numerals is C (100) + XX (20) + VIII (8) = CXXVIII.

When writing a large number in Roman numerals, we group the numbers. To write 128 in Roman numerals, group 128 as 100 + 20 + 8.

100 in Roman numerals is C.
20 in Roman numerals is XX.
8 in Roman numerals is VIII.

So, 128 is written as CXXVIII in Roman numerals.

Roman numerals follow a certain pattern, making them look similar. In this section, we will learn some numbers related to the Roman numeral 128.

• Addition Rule: The addition method is used when a larger number is followed by a smaller numeral, and the values are added. For example, CXXVIII = C + XX + VIII = 100 + 20 + 8 = 128.

• Grouping Method: Here, the given number is grouped based on place value, and we convert each group into its Roman numeral. For example, 128 = 100 + 20 + 8 = CXXVIII.

• Repetition Rule: Certain symbols (I, X, C, M) in the Roman numeral system can be repeated only up to three times. For example, XXX = 30 (X is repeated three times to represent 30).

• Subtraction Method: A smaller numeral before a larger one indicates subtraction. For example, IV = 5  1 = 4.

• Limitation Rule: Roman numeral symbols cannot be repeated more than three times, and some symbols like V, L, and D cannot be repeated at all.