Addition is one of the four basic operations in arithmetic (along with subtraction, multiplication, and division). It involves combining two or more numbers to find their total or sum.
Symbol: The plus sign (+) represents addition.

Commutative Property: Changing the order does not change the sum.
Associative Property: Grouping numbers differently does not change the sum.
Identity Property: Adding zero to any number leaves it unchanged.
Identity Property: Adding zero to any number leaves it unchanged.
Inverse Element: Every number has an additive inverse, which is the number that, when added to the original number, results in 0.

When adding numbers with multiple digits, if the sum of the digits in any column is greater than or equal to 10, we carry the excess to the next column to the left.

Counting objects, Calculating totals (money, distances, etc.), Solving real-world problems.