Commutativity property of addition of whole numbers, i.e., a+b=b+a, where a and b are whole numbers.
Example:-
2+4=4+2=6
Associativity property of addition of whole numbers, i.e., a+b+c=(a+b)+c=a+(b+c).
So,
3+(5+4)=(3+5)+4.
Whole numbers obeys the associative and commutative property .
Hence, the given statement is true.