The expression "1+1" represents a basic arithmetic operation known as addition. In this case, it combines the number 1 with another 1. The result of this operation is 2, which is the sum of the two numbers. Addition is one of the fundamental operations in mathematics, used to calculate totals and combine quantities. In everyday life, the concept of "1+1" can be seen in various situations. For example, if you have one apple and receive one more apple, you will have a total of two apples. This simple principle of combining quantities is essential for understanding more complex mathematical concepts.