Samy wrote:Nice analogy.
BB = addition and subtractionCRB = logarithms and exponentials
Now, it would be pretty damn useful to learn about multiplication and division somewhere between those two products.
As an historic note, for the longest time the whole point of learning logs & exponents was to convert multiplication into addition and likewise for division and subtraction. The log of a product is the sum of the logs of the multiplicands. Thus, one hard mult is replaced by two table look ups (or slide rule uses), an easy addition, and one more table look up to exponentiate the sum. Likewise, the log of a quotient is the the log of the dividend minus the log of the divisor.
Of course, since the semiconductor revolution, that's been less relevant, though depending on the architecture, these facts may be used in how the machine does these kinds of calculations.