游标卡尺读数问题是高中物理的一个教学难点。让学生懂得读数规则的来龙去脉,在道理上明白为什么采取某些措施可以提高一次读数正确率,可以很好地突破这个教学难点。 Vernier caliper reading problem is a teaching difficulty in high school physics. Let students understand the ins and outs of reading rules. It is reasonable to understand why taking certain measures can improve the accuracy of one reading, and it can be a good breakthrough in this teaching difficulty.