noun
a mathematical concept that refers to the number 0, which when added to any number, does not change the value of that number
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In mathematics, the additive identity is the number zero, denoted as 0.
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The additive identity is basically just the number zero.
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Zero is like the superhero of addition, it's the additive identity.
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Just like how zero is the starting point in math, the additive identity is the foundation of addition.