Math Without Words

摘要

I was never any good at math. My poor father, a physicist, used to sit with me after school and attempt to explain why it would cost Johnny $1.90 to buy four apples at a quarter each, plus six oranges at fifteen cents each. I was thinking about tennis matches and my friends, not about Johnny and his shopping adventures. (I am pleased to say, however, that like most people, I am no longer paralyzed by such simple problems and have no trouble purchasing my own fruit and obtaining the correct change.)