1. What is Subtraction?

Subtraction is one of the four basic arithmetic operations. It represents the operation of removing objects from a collection, finding the difference between two numbers, or determining how much one number is less than another.

2. How Does the Calculator Work?

The calculator uses the subtraction formula:

Where:

• \( a \) — The minuend (number from which another number is subtracted)
• \( b \) — The subtrahend (number to be subtracted)

Explanation: The calculator subtracts the value of b from the value of a to find the difference between the two numbers.

3. Importance of Subtraction

Details: Subtraction is a fundamental mathematical operation used in everyday life, from calculating change in financial transactions to measuring differences in scientific experiments and solving complex engineering problems.

4. Using the Calculator

Tips: Enter any numerical values for a and b. The calculator supports both integers and decimal numbers with up to 4 decimal places precision.

5. Frequently Asked Questions (FAQ)

Q1: What if the result is negative?
A: A negative result indicates that the subtrahend (b) is larger than the minuend (a), representing a negative difference between the two values.

Q2: How many decimal places does the calculator support?
A: The calculator supports up to 4 decimal places for precise calculations.

Q3: Can I subtract fractions using this calculator?
A: Yes, you can enter decimal values that represent fractions (e.g., 0.5 for 1/2).

Q4: What is the order of subtraction?
A: The calculator subtracts b from a (a - b), not b from a (b - a). The order matters in subtraction.

Q5: Can this calculator handle very large numbers?
A: The calculator can handle numbers within the limits of standard floating-point arithmetic in PHP.