The equation "2 + 2 = 4" is a basic arithmetic statement that illustrates the concept of addition. In this equation, the numbers 2 and 2 are added together to yield the sum of 4. This operation is fundamental in mathematics and serves as a building block for more complex calculations. Addition is one of the four primary mathematical operations, alongside subtraction, multiplication, and division. Understanding "2 + 2 = 4" helps individuals grasp the principles of counting and combining quantities, which are essential skills in everyday life and various fields, including science and finance.