This Does Not Add Up

Several hours after I beam about getting 50% of the math questions right on a GRE diagnostic test, I attend a meeting at which I agree to teach two classes on budgeting to child care directors. (I will also be teaching a class on budgeting/finance through the city university system this spring.) I realize that comparing 2xy to (2x)y is not the same mathematical process as is used in constructing an operating budget, but this still cracks me up.