教学目标:1.结合实际例子,使学生明确学习截取商的近似值的实际意义,进一步体验学习数学的目的,调动学生学习数学的积极性。2.使学生掌握截取商的近似值的一般方法,初步学会在小数除法中用四舍五入法截取商的近似值。3.提高学生比较、分析、判断的能力。教学重点:掌握求商的近 Teaching objectives: 1. Combine the practical examples, so that students can learn the practical significance of the interceptors’ approximate value, further experience the purpose of learning mathematics, and arouse their enthusiasm for learning mathematics. 2. To enable students to grasp the approximation of the general method of interceptors, initially learned in the decimal division using rounding method to intercept the approximation of the quotient. 3. Improve students’ ability to compare, analyze and judge. Teaching focus: grasp the business of the near