People are bad at math because of how they are taught it.....It's taught in terrible pieces when basic math can be taught in a much larger an simpler blanket.
Once my kids knew how to add the first 10 numbers, I taught them how to multiply.....Adding large numbers 1 by 1 is stupid. And I start with 9.
LOL, this is the kind of salt I love. The retarded janitor with no friends, dubious family, and a dry dick is calling me a shut in. Woe is me the day I find interest in other people's discarded receipts.