How to Write 18 in Roman Numerals?

Writing 18 in Roman numerals is straightforward once you understand the basics. Roman numerals use combinations of letters to represent numbers, primarily I (1), V (5), X (10), L (50), C (100), D (500), and M (1000). For 18, the symbol is XVIII, a combination of 10 (X) and 8 (VIII). The number 8 is formed by adding 5 (V) and 3 (III). Unlike numbers like 4 (IV) or 9 (IX), which use subtraction, 18 is written by directly adding the values.

Learning Roman numerals not only helps with basic math concepts but also connects us to ancient history and traditions. Exploring numbers like 18 introduces students to the additive principles of Roman numeral notation. Let’s dive deeper into this fascinating system and continue the journey of learning!

How to Write 18 in Roman Numerals?

To write 18 in Roman numerals, you use the combination XVIII. This is formed by adding X (10) and VIII (8). The symbol for 8 comes from adding V (5) and III (3). Unlike numbers like 4 (IV) or 9 (IX), which involve subtraction, 18 is written by straightforward addition of the symbols.

This makes 18 easy to write once you understand the basic Roman numeral rules. It’s a simple yet fascinating way to connect with an ancient numbering system while learning how to combine symbols effectively.

Number	Roman Numeral
18	XVIII

Also Read: Roman Numerals 1 to 1000: Download Free PDF

How to Convert XVIII to Number

To convert XVIII from Roman numerals to a number, you simply need to know the values of the symbols and add them together. In XVIII:

• X = 10
• V = 5
• I = 1 (and there are three I’s, so 1 + 1 + 1 = 3).

Now, add these values:
10 (X) + 5 (V) + 3 (III) = 18.

Roman numerals are built using a combination of these seven symbols (I, V, X, L, C, D, M), each with a fixed value. By understanding these values, you can easily convert Roman numerals like XVIII into their numerical 

XVIII = 18 So, if you see XVIII alone, it directly represents the number 18

Also Read: How to Write 100 in Roman Numerals? 

Exercise on 18 in Roman Numerals

Let us practice some questions on Roman Numerals here.

Addition and Subtraction

Add/subtract the following numbers and answer in Roman Numerals

1. 10 + 8 = ___
2. 20 – 2 = ___
3. 50 + 18 = ___
4. 100 – 18 = ___

Answers:

1. XVIII
2. XVIII
3. LXVIII
4. LXXXII

Convert to Roman Numerals

Convert the following numbers into Roman numerals:

1. 18
2. 28
3. 38
4. 48

Answers:

1. 18 = XVIII
2. 28 = XXVIII
3. 38 = XXXVIII
4. 48 = XLVIII

Convert to Numbers

Convert the following Roman numerals to numbers:

1. XVIII
2. XXVIII
3. XXXVIII
4. XLVIII

Answers:

1. XVIII = 18
2. XXVIII = 28
3. XXXVIII = 38
4. XLVIII = 48

Match the Following

Match the following numbers to Roman numerals:

Numbers	Roman Numerals
(i) 18	(a) XXXVIII
(ii) 28	(b) XVIII
(iii) 38	(c ) XLVIII
(iv) 48	(d) XXVIII

Answers:

(i) 18 → (b) XVIII

(ii) 28 → (d) XXVIII

(iii) 38 → (a) XXXVIII

(iv) 48 → (c) XLVIII

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