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Addition is a fundamental arithmetic operation that combines two or more numbers to produce a sum. It is one of the four basic operations of arithmetic, the others being subtraction, multiplication, and division. The addition operation is denoted by the plus sign (+). For example, the sum of 2 and 3 is written as 2 + 3, which equals 5.

Addition is commutative, meaning the order of the numbers being added does not affect the sum. For instance, 2 + 3 is the same as 3 + 2. This property is often used to simplify calculations. Addition is also associative, meaning that when adding three or more numbers, the grouping of the numbers does not affect the sum. For example, (2 + 3) + 4 is the same as 2 + (3 + 4).

In addition to whole numbers, the concept of addition can be extended to other types of numbers, such as fractions, decimals, and negative numbers. The rules of addition remain the same, but the methods for performing the operation may vary. For example, adding fractions requires finding a common denominator, while adding decimals involves aligning the decimal points.

Addition is widely used in various fields, including mathematics, science, engineering, and everyday life. It is a basic skill that is taught to children at an early age and is essential for more advanced mathematical concepts. Understanding addition is crucial for solving problems, making calculations, and analyzing data.