For this case we have the following expression:

The difference of both numbers is:

We note that for number 14 we have:
tens place: 1
ones place: 4
Therefore, number 14 can be rewritten as:

Thus, the given expression can be rewritten by replacing values such as:

Then, for associative property we have:

We observe that the difference is also 8.
Answer:
the difference
Rewriting:
