“假如设计一座桥梁,小数点错一位可就要出大问题、犯大错误,今天我扣你3/4的分数,就是扣你把小数点放错了地方。”1933年,在一次随机的考测之后,区嘉炜教授这样开导卢嘉锡,他显然注意自己最喜欢的这个大学三年级的学生对老师的评分有点想不通。区教授教的是物理化学,平时挺喜欢考学生,评分也特别严格。这回出的考题中,有道题目特别难,全班只有卢嘉锡一个人做出来,可是因为他把答案的小数点写错了一位,那道题目老师只给了1/4的分数。如何才能避免把小数点放错地方呢?在理解了教师重扣的一片苦心之后,卢嘉锡思索着。 “If you were to design a bridge, if one decimal point was wrong, you would have to make a big problem and make a big mistake. Today, I deducted 3/4 of your score. That is, you deducted the decimal place.” 1933, in a random After the examination, Prof. Jiawei Jia initiated Lu Jiaxi. Obviously, he noticed that his favorite third-year university student’s score on the teacher was a bit unreasonable. The district professor teaches physical chemistry and usually likes to test students, and the score is particularly strict. In this question, there was a particularly difficult problem. The entire class was only made by Lu Jiaxi, but because he wrote the wrong decimal point, the teacher gave only one quarter of the score. How can we avoid putting the decimal point in the wrong place? After understanding the teacher’s heavy deduction, Lu Jiaxi pondered.