Answer:
The property used is 'Additive identity property'.
Step-by-step explanation:
Given : Expression
To find : What is the property used for expression ?
Solution :
In the expression there is an addition of zero into a real number gives a real number.
The property used in the expression is 'Additive identity property'.
The additive identity property states that if you add a real number to zero or add zero to a real number, then you get the same real number back.
The number zero is known as the identity element, or the additive identity.
Therefore, The property used is 'Additive identity property'.