When Johnny can't count
Can you subtract eight from 20?
Take a moment.
Here is a scene described to me by my aunt. She was enjoying a street festival when she selected a book selling for $8. Not something like $8.13, just a flat eight bucks.
She handed the teenager behind the table a $20 bill, and then watched in horrified fascination as the girl struggled with the math to determine the amount due.
Discussions with other teenagers behind that table didn’t immediately result in an answer. One person tried to work it out on a cellphone, but that wasn’t going well either. Finally, someone clued in and the exchange was completed.
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