Answer and Step-by-step explanation:
Zero is considered a number in mathematics because it's a whole number and an integer. In the number system, zero is a fundamental numerical value that represents the absence or null quantity of a certain value. It plays a crucial role in arithmetic, algebra, and other branches of mathematics.
Zero has unique properties, such as being the additive identity (adding zero to any number doesn't change the number) and the multiplicative identity (multiplying any number by zero gives zero). It serves as a placeholder in the positional notation system, enabling us to represent numbers of different magnitudes.