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Subtraction is a mathematical operation that involves taking away a number or quantity from another number or quantity to find the difference between the two. It is typically denoted by the minus sign (-) and is the opposite of addition. In subtraction, the number being subtracted is called the subtrahend, the number it is being subtracted from is called the minuend, and the result is called the difference. Subtraction is used in various everyday situations, such as calculating change, determining distances, and solving mathematical problems.