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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).
Multiplicative Identity states that the product of any number and one is the number itself.
For every real number, x, which is not zero, there exists a real number x' such that x * x' = x' * x = 1, the multiplicative identity.
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.