>Brainetics is a $200 DVD package which supposedly teaches your kids cool math tricks and makes learning math fun. They just did a piece on Fox 5 about the program and presented this problem:
(leading zeros to make the columns line up properly)
The method they claimed was the “Brainetics” way was to take the last column of numbers and sum them (18), subtract from 100 (82), and then assemble the two answers to get (82)(18) or 8218. While this is indeed the correct answer, I have no idea why it works or how contrived the problem is.
I would like to know if any of you know the “trick” behind this. Feel free to comment if you know.
My complaint about this is that stories like this on the local news treat math as if there’s some “trick” to it and if the school system just hired this huckster to teach your kids some math magic tricks, then everything would be swell again. I’m about to pull a “back in my day”, so I’ll stop here.
Full story available here:
search for “brainetics”