The number 1 is the multiplicative identity. What this means is that if you multiply a number by 1, that number is unchanged (the result is equal to the original number).
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Multiplicative Identity states that the product of any number and one is the number itself.
When you multiply a number times 1, you can get the same number multiplicative identity. When you add a 0 to a number, you can get the same number additive identity.
1 is the multiplicative identity.
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One is the multiplicative identity or the identity of/for multiplication.