高中物理教材涉及的游标卡尺,是精度为0.1mm的游标卡尺。每当物理教师讲授这部分教材时,总会对其读数的有效数位提出疑问,引起争论,本文将提出这些疑问,并探讨解决的办法。 用米尺测量物体的长度时,由于米尺的最小分度为1mm,故读数精确到1mm。对于不足1mm的部分,读出时应保留估计 The vernier caliper involved in the high school physics textbook is a vernier caliper with an accuracy of 0.1 mm. Whenever a physics teacher teaches this part of the textbook, he will always question his effective digits of the reading and cause controversy. This article will ask these questions and discuss solutions. When measuring the length of an object with a metre, the minimum reading of the metre is 1mm, so the reading is accurate to 1mm. For parts less than 1mm, keep the estimate when reading