论文部分内容阅读
1特点与用途本教具是将数字吊秤改装为台秤,用于小学数学、科学教学中称量物体的重量。该台秤具有去皮、自动置零、多单位转换等功能。称重范围0-10kg,分度值5g。2制作方法2.1选取一个直径为15cm的塑料圆盘,再截取直径为2cm、长20cm的一段铁管,将铁管固定在圆盘中心位置。在距铁管底端7cm和14cm处打出两个小孔,用螺丝把吊秤固定在铁管上。2.2截取直径为0.5cm、长
1 Features and uses The teaching aids is to convert the digital crane scale into a scale for the primary school mathematics, science teaching weighing the weight of the object. The scale with peeled, automatic zero, multi-unit conversion and other functions. Weighing range 0-10kg, division value 5g. 2 production methods 2.1 Select a diameter of 15cm plastic disc, and then intercepted diameter of 2cm, 20cm long section of iron pipe, the iron pipe is fixed in the center of the disc. In the distance from the bottom of the iron pipe 7cm and 14cm at the two holes hit, with a screw to hang the scale on the iron pipe. 2.2 Intercept diameter of 0.5cm, long