If you are talking about the associative property in math, then it is when you keep the order in an equation the same but you change the grouping.
Example: 4+(2+9)=(4=2)+9
See? The order 4, 2, and 9 stay the same but the parenthesis are changed. Regardless of the postion of the () you will always have the same sum. NOTE: This will also word with multiplication
Chat with our AI personalities