Which is
Commutative property
Associative property
3(4+5)=12+15
5+6+2=2+5+6
7+(3+4)=(7+3)+4
The commutative property is 3(4+5)=12+15, which means that the order of the numbers being added or multiplied does not affect the result.
The associative property is 5+6+2=2+5+6, which means that the grouping of numbers being added does not affect the result.
The equation 7+(3+4)=(7+3)+4 represents the associative property.