Addition
Add two numbers together with our free online addition calculator. Simple arithmetic tool for adding any two real numbers with instant results.
About This Calculator
This simple addition calculator adds two numbers and returns their sum. Enter any real numbers -- positive, negative, integers, or decimals -- and instantly get the result.
Frequently Asked Questions
How does addition work?
Addition is combining two numbers to find their total sum. For example, 5 + 3 = 8. It is one of the four basic arithmetic operations.
What are the properties of addition?
Commutative: a + b = b + a. Associative: (a + b) + c = a + (b + c). Identity: a + 0 = a.
Can I add negative numbers?
Yes. Adding a negative number is equivalent to subtraction. For example, 10 + (-3) = 7.
What is the sum of zero?
Zero is the additive identity. Adding zero to any number does not change it: a + 0 = a.
How is addition used in real life?
Counting money, calculating shopping totals, adding ingredients, tracking distances, and summing scores in games.
Is this tool free?
Yes, all calculators on Calculy are completely free to use with no registration required.