638 in Roman Numerals

Royal titles like Henry I, Henry II, etc., often use Roman Numerals. Have you ever wondered what these symbols represent? These are Roman Numerals. Ancient people used fingers, sticks, bones, etc., to count.

As life became more complex, a standardized form was necessary. Ancient Romans developed the Roman Numeral system with symbols I (1), V (5), X (10), L (50), C (100), D (500), and M (1000).

In Roman Numerals, we use DCXXXVIII to represent 638, where D is 500, C is 100, X is 10, and I is 1. Let’s learn more about Roman numerals and how we write them.

There are certain basic rules to write a number in Roman Numerals. In this section, we’ll discuss the basic rules for 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, DCXXXVIII → D + C + XXX + VIII → 500 + 100 + 30 + 8 = 638

Rule 2: Repetition Method

To write large numbers, certain Roman Numerals (I, X, C, M) can be repeated up to three times. For example, XXX → 30.

Rule 3: Subtraction Method

If a smaller number precedes a larger number, it is subtracted from the larger number. For example, IV → V - I → 5 - 1 = 4

Rule 4: Limitation Rule

Symbols cannot be repeated more than three times, and symbols like V, L, and D cannot be repeated. For example, we don't write VV for 10; instead, we use X.

Let’s now learn how to write 638 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. In this section, we will learn how to write 638 in Roman numerals using the expansion method. To write 638 in Roman Numerals, follow the steps,

Step 1: Break the number based on place value; ones, tens, hundreds, etc. For 638, we write it as 500 + 100 + 30 + 8

Step 2: Convert the number into Roman Numerals:

500 in Roman Numeral - D

100 in Roman Numeral - C

30 in Roman Numeral - XXX

8 in Roman Numeral - VIII

Step 3: Combine the Roman Numerals together: Therefore, 638 in Roman Numerals is D (500) + C (100) + XXX (30) + VIII (8) = DCXXXVIII

When writing a large number into Roman Numerals, we group the numbers. To write 638 in Roman Numerals, we group 638 as 500 + 100 + 30 + 8.

500 in Roman Numeral - D

100 in Roman Numeral - C

30 in Roman Numeral - XXX

8 in Roman Numeral - VIII

So, 638 is written as DCXXXVIII 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 638:

• Addition rule: The addition method is used when a larger number is followed by a smaller numeral; here, the values are added. For example, DCXXXVIII = D + C + XXX + VIII = 500 + 100 + 30 + 8.

• Grouping method: Here, the given numbers are grouped based on their place value, and then each group is converted into Roman numerals. For example, 638 = 500 + 100 + 30 + 8 = DCXXXVIII.

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

• Subtraction rule: This rule is used when a smaller numeral precedes a larger one, indicating subtraction. For example, IV = 5 - 1 = 4.

• Place value: Understanding the place value helps in breaking down numbers into hundreds, tens, and ones, which is crucial for converting them into Roman Numerals.