The sum is the answer in an addition problem.

Answer for an addition problem= sum.

Answer for a subtraction problem= difference.

Answer for a multiplication problem= product.

Answer for a division problem= quotient.

This problem can be modeled and tested quite easily. Set A can be [X,Y], subset B [X,Y], and subset A [X,Y]. Therefore A and B are equivalent.

A sum is an answer to an addition problem and a product is an answer to a multiplication problem

The first part of the problem we take an object and break it down to four equal subset. Mathematical written as 1/4. The next step is to further divide each of the four subsets into four sub-subsets. That will give a total of sixteen sub sets of the whole. 1/4*1/4=1/16 or object divided into subset, subset, subset, subset and then each subset divided into sub-subset, sub-subset, sub-subset, sub-subset. Gives a total of sixteen sub-subset