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On Tue, 1 May 2001, Mike Miller wrote:
> I'll just add that I might have forgotten it, but I don't think I ever
> learned "casting out nines" either. On the other hand, I certainly
> learned enough to be able to see immediately how it works. I did learn at
> some point in grade school that the remainder for a number after division
> by 9 was always equal to the remainder for the sum of the digits of that
> same number after division by 9.
Now, that's pretty sadistic. Teach kids something like this, but then
don't go the whole way and give them a way to do something truly useful...
that sounds very "new math" to me. :-/
jking
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