五年制小学课本数学第三册第三单元“米、公斤的认识”是在学生学过市制长度单位——尺、寸和市制重量单位——斤、两的基础上进行教学的。通过教学使学生初步建立公制长度单位和重量单位的概念,学会用米尺量物体长度的方法,用台秤、天平秤物体重量的方法,了解公制长度单位和公制重量单位的进率、换算率,并 The five-year primary school textbook, the third volume of mathematics, the third unit, “Knowledge of Rice and Kiln,” is based on the students’ learning of the length of municipal units - feet, feet and municipal units of weight - two pounds. Through teaching students to establish the initial concept of the metric unit of length and weight units, learn the method of measuring the length of the object with a meter scale, the method of using scales, scale weight, understand the metric rate unit and the metric unit of weight rate, conversion rate, and