ABSTRACT
For example, suppose that I have two bank accounts, one in the United States of America and one in England, and am asked, "How much money do you have?" Suppose further that my account in the United States has a balance of $1000 and that my account in England has a balance of 500£. I do not get a - meaningful application of the equation
total money = money in US + money in England (5.1-2) if I perform the calculation as
The answer is meaningless, because I have added two numbers that result from measurements using two different scales.
