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.
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The additive identity property states that any number plus zero is that number. For example: 5 + 0 = 5.
no 1 is not an additive identity
Zero is the additive identity.
Additive identity property