Final answer:
The algebraic expression property being used is the Identity Property, which states that when an element is combined with the identity element for a given operation, the result is that element itself.
Step-by-step explanation:
The algebraic expression property being used in the equation -1/4 + 0 = -1/4 is the Identity Property.
The Identity Property states that when an element is combined with the identity element for a given operation, the result is that element itself. In this case, the identity element for addition is 0, so when we add 0 to any number, the result is the original number unchanged.
Therefore, the equation -1/4 + 0 = -1/4 demonstrates the Identity Property.
Learn more about Identity Property