The additive identity is zero. When you add a number and 0, the sum equals the original number.
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no 1 is not an additive identity
when you add
Zero.
It is a statement equivalent to saying that 0 is the additive identity.
The additive identity for a set is a number (denoted by 0) such that a + 0 = 0 + a = a for all elements a which belong to the set.