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Adding $$0$$ (zero) and multiplying $$1$$ (one) to any integer will not change the result (or) the sum. This is called the identity property of integers.
Identity property of $$1$$:
Identity property of $$1$$ (one) says that any number multiplied by $$1$$ (one) remains the same.
It can be represented as,

$$a × 1 = a$$
Example:
1. $$11 × 1 = 11$$

2. $$2 × 1 = 2$$.
Important!
$$1$$ (one) is called a multiplicative identity.