Answer:
Additive inverse property.
Step-by-step explanation:
We are given that an expression
![-6+6=0](https://tex.z-dn.net/?f=-6%2B6%3D0)
We have to find which property of real numbers is shown in the given expression.
Additive inverse property of real number :It is that property by which when a number is added to its negative value of the number then sum will be zero.
Mathematical representation
![a+(-a)=-a+a=0](https://tex.z-dn.net/?f=a%2B%28-a%29%3D-a%2Ba%3D0)
Therefore, given expression shows additive inverse property.