**How to Write IV Roman Numerals?:** The number **4 is written as IV in Roman numerals.** This is because Roman numerals use a subtractive combination. When a smaller numeral precedes a larger one, you subtract the smaller numeral.

Here, I (1) comes before V (5), indicating 5 – 1, which equals 4.

**Example:**

IV = V – I

IV = 5 – 1

IV = 4

Here, we directly consider a group of Roman Numerals for addition/subtraction.

IV = 4

Hence, the numerical value of IV Roman Numerals is 4.

## Steps to Write IV Roman Numerals

**Identify the Larger Numeral:**In this case, V (5) is the larger numeral.**Place the Smaller Numeral Before the Larger One:**Place I (1) before V (5).**Understand the Subtraction Rule:**Since I is before V, subtract 1 from 5.**Combine the Numerals:**IV represents 4.

## Rules for Writing Roman Numerals

### Subtractive Notation

Subtractive notation is an important element of Roman numerals and applies to other numbers as well. Here are a few examples:

- IV = 4 (5 – 1)
- IX = 9 (10 – 1)
- XL = 40 (50 – 10)
- XC = 90 (100 – 10)
- CD = 400 (500 – 100)
- CM = 900 (1000 – 100)

### Additive Notation

When a smaller number follows a larger number, you add the values. Here are some examples:

- VI = 6 (5 + 1)
- VII = 7 (5 + 2)
- VIII = 8 (5 + 3)
- XII = 12 (10 + 2)
- XVI = 16 (10 + 5 + 1)

### Combining Symbols

To write numbers, we combine these basic symbols according to the rules of additive and subtractive notation. Here are some more examples:

- XV = 15 (10 + 5)
- XX = 20 (10 + 10)
- XXV = 25 (10 + 10 + 5)
- XXX = 30 (10 + 10 + 10)
- XL = 40 (50 – 10)
- L = 50