One day, the teacher inquired Peter: "How much is four minus four?" Peter was tongue-tied.
The teacher got angry and said: "What a fool! You see, if I put four coins in your pocket, but there is a hole in your pocket and all of them leak out, now what is left in your pocket?"
"The hole." Replied Peter.
一天,老師問彼得:“4減4等于幾?”彼得張口結(jié)舌答不上來。
老師生氣地說:“真笨!比如我給你衣袋里裝進(jìn)4個硬幣,可你衣袋上有個窟窿,硬幣全從這里漏掉了,那么,你衣袋里還剩下什么?”“還剩下個窟窿。”彼得答道。