４－４＝？

One day， the teacher inquired Peter:\"How much is four minus four?\" Peter wastongue-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.

四減四等于幾?

一天，老師問彼得：“4減4等于幾?”彼得張口結舌答不上來。

老師生氣地說：“真笨!比如我給你衣袋里裝進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。