The expression "2+2" represents a simple mathematical operation known as addition. In this case, the number 2 is added to another 2, resulting in a total of 4. This operation is fundamental in arithmetic and is often one of the first concepts taught in mathematics. Addition is a basic skill used in everyday life, from counting objects to managing finances. Understanding "2+2" helps build a foundation for more complex mathematical concepts. The result, 4, can also be visualized with physical objects, such as four apples, making it easier to grasp the idea of combining quantities.