4-4=?
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.
四减四等于几？
一天，都是问彼德：“四减四等于几？”彼德张口
结舌答不上来。
老师生气地说：“真笨！你想，如果我放四个硬币
在你的口袋里，但你的口袋里有个窟窿，结果四个
硬币都漏掉了。那么，你的口袋里还有什么？”
“窟窿，”彼德答道。