近几年高考中,仪器读数问题频频出现,在中学阶段,需要估读仪器的刻度线划分为三种:十分度、五分度和二分度。以下分类讨论其估读方法:一、十分度仪器的读数常见的毫米刻度尺就是十分度,1 cm平均分成10份,每一份为1 mm,精度是1mm,如图1所示,读数时要在精度后面估读一位。例如,在做“研究匀变速直线运动”的实验时,某同学得到一条用打点计时器打下的纸带,并在其上取了A、B、C、D、E、F等6个计数点(每相邻两个计数点间还有4个计时点,图2中没有画出)如图2所示,打点计时器接的是220 V、50 Hz的交 In recent years college entrance examination, instrument readings frequently appear in the secondary stage, need to read the instrument tickline divided into three kinds: ten degrees, five degrees and two degrees. The following classification discusses its method of evaluation: First, the ten degrees Instrument reading Common millimeter scale is ten degrees, 1 cm divided into 10 equally divided, each 1 mm, the accuracy is 1mm, as shown in Figure 1, when reading To read a precision behind. For example, during the experiment of “researching uniform speed linear motion”, a classmate got a strip of paper laid down with a timekeeping timer and took 6 pieces of A, B, C, D, E, F etc. Counting points (there are 4 timing points between two adjacent counting points, not shown in Figure 2) As shown in Figure 2, the RBI timer is connected to 220 V, 50 Hz