Zero is called the additive idenity because any # you add to zero will give you that original number you added to zero. Its like why one is called the multiplecation idenity. Because any # you multiply by one will get you that original # that you multiplied by one. Hope this helps!
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Zero.
The additive identity is zero. When you add a number and 0, the sum equals the original number.
Zero is the additive identity.
The additive identity property states that any number plus zero is that number. For example: 5 + 0 = 5.
It is a tautological description of one of the basic properties of numbers used in the branch of mathematics called Analysis: Property 2: there exists an additive identity, called 0; for every number n: n + 0 = 0 + n = n. Property 3: there exists an additive inverse, of every number n denoted by (-n) such that n + (-n) = (-n) + n = 0 (the additive identity).