Subtraction is a fundamental arithmetic operation that involves finding the difference between two numbers. It represents taking away or finding out what is left after removing a part from a whole. For example, when you subtract 3 from 7, you are left with 4. Subtraction is denoted by the minus sign (-) and is the inverse operation of addition. It helps us compare quantities, determine missing values, and solve various real-life problems. Understanding subtraction is essential for everyday tasks like calculating change, measuring distances, and working with negative numbers.