I'd guess distributive. Why?
idk I have to identify the property of real numbers and that was one of my problems. I don't understand any of the properties. please steve.
posted by bob
If you really don't understand anything about the properties, I suggest google. If you search for "distributive property" you will find many explanations and examples.
If it's still unclear, you really need to sit down with your teacher and get some in-person help.