论文部分内容阅读
《数学课程标准(2011年版)》提出:“估算在日常生活与数学学习中的应用十分广泛,培养学生的估算意识,提高学生的估算能力,让学生拥有良好的数感,具有重要的价值。”新课程非常重视估算教学,教师也认识到估算的重要性。然而,由于部分教师对估算教学认识不到位以及缺乏对估算知识的研究学习,在教学中过分强调答案的准确性、唯一性,将估算教学简单化、模式化,忽略估算策略的优化,致使估算教学缺位甚至错位。一、估算结果越精确越好吗?问题描述:最接近准确答案的估算是
The Mathematics Curriculum Standard (2011 Edition) states: “Estimation is widely used in daily life and maths learning to develop students 'sense of estimation and improve students' estimation ability so that students have a good sense of number and are of great value . ”The new curriculum attaches great importance to the evaluation of teaching, teachers also recognize the importance of estimation. However, because some teachers do not know the teaching of estimation well and lack of research on the estimation of knowledge, they over-emphasize the accuracy and uniqueness of the answer in teaching. It simplifies the teaching and simplifies the teaching, ignores the optimization of the estimation strategy, Teaching absence or even dislocation. First, the more accurate the estimated results the better? Problem Description: The closest accurate answer is