173 in Roman Numerals

Royal titles like Henry I, Henry II, and so on are often seen with Roman numerals. These symbols (I and II) represent numbers. In ancient times, people counted using fingers, sticks, bones, etc.

As life became more complex, a standard form of counting was needed, and the ancient Romans developed the Roman numeral system. The symbols I (1), V (5), X (10), L (50), C (100), D (500), and M (1000) are used to count.

In Roman numerals, we use CLXXIII to represent 173, where C is 100, L is 50, XX is 20, and III is 3. Let’s learn more about Roman numerals and how we write them.

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

Rule 1: Addition Method

The addition method is used when a smaller number is placed after a larger number. For example, CLXXIII → C + L + X + X + I + I + I → 100 + 50 + 10 + 10 + 1 + 1 + 1 = 173.

Rule 2: Repetition Method

To write larger numbers, certain Roman numerals can be repeated up to three times. For instance, III → 3.

Rule 3: Subtraction Method

If a smaller number is placed before a larger number, the smaller number is subtracted from the larger one. For example, IX → X - I → 10 - 1 = 9.

Rule 4: Limitation Rule

Symbols cannot be repeated more than three times, and symbols like V, L, and D cannot be repeated. For example, 10 is written as X, not VV, and 8 is written as VIII, not IIIIIIII.

Let’s now learn how to write 173 in Roman numerals. Follow these methods to write the number in Roman numerals. 

• By Expansion Method
• By Grouping Method

In the expansion method, numbers are broken down based on place value. Here, we'll learn how to write 173 in Roman numerals using the expansion method.

To write 173 in Roman numerals, follow these steps:

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

For 173, we write it as 100 + 50 + 20 + 3

Step 2: Convert each part into Roman numerals:

100 in Roman numerals is C
50 in Roman numerals is L
20 in Roman numerals is XX
3 in Roman numerals is III

Step 3: Combine the Roman numerals:

Therefore, 173 in Roman numerals is C (100) + L (50) + XX (20) + III (3) = CLXXIII

When writing a large number in Roman numerals, we group the number. 

To write 173 in Roman numerals, we group it as 100 + 50 + 20 + 3:

100 in Roman numerals is C
50 in Roman numerals is L
20 in Roman numerals is XX
3 in Roman numerals is III

So, 173 is written as CLXXIII 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 173.

• Addition rule: The addition method is used when a large number is followed by a smaller numeral, and the values are added. For example, CLXXIII = C + L + X + X + I + I + I = 173.

• Grouping method: Numbers are grouped based on place value and then converted into Roman numerals. For example, 173 = 100 + 50 + 20 + 3 = CLXXIII.

• Repetition rule: Certain symbols (I, X, C, M) in the Roman numeral system can be repeated up to three times. For example, III = 3 (I is repeated three times).

• Subtraction rule: If a smaller numeral precedes a larger one, subtract the smaller from the larger. For example, IX = X - I = 9.

• Limitation rule: Symbols cannot be repeated more than three times, and some symbols like V, L, and D cannot be repeated.