Overview
Negative numbers lie to the left of zero, and positive numbers lie to the right. Arithmetic follows clear sign rules, and this calculator applies them and shows the sign of the result.
Formula
Addition and subtraction: combine absolute values while respecting signs. Multiplication and division: like signs give a positive result, unlike signs give a negative result.
How it works
Enter the two numbers
They can be negative or positive.
Choose the operation
Addition, subtraction, multiplication or division.
Read the result and sign
The result appears with each number's sign and the sign rule.
Worked examples
Example 1: −8 + 3
−5, because the larger absolute value is 8 and its sign is negative.
Example 2: −4 × −3
12, because the signs are the same.
Frequently asked questions
Is negative × negative positive?
Yes. Multiplying two negative numbers gives a positive result.
How do I subtract a negative number?
Subtracting a negative number is the same as adding its absolute value: a − (−b) = a + b.
Is division by zero possible?
No. Division by zero is undefined.
This calculator is for educational and informational purposes only and is not a substitute for professional advice.