三年级数学教学质量不高,学生学习成绩大幅度下降的原因是什么呢?我认为主要有以下几方面:其一,三年级是小学数学教学中的关键年段.这一阶段涉及内容多,难点多,坡度大.三年级学生的认数范围从万以内扩大到多位数,数的概念更加抽象;数的运算从一位数乘除多位数,扩展到两、三位数乘除多位数,并要求掌握四则运算的理论知识;计算能力的训练内容由口算、笔算发展到珠算;应用题从简单的两步应用题扩展到较复杂的两步应用题和三步复合应用题.这就对学生的抽象概括 Third grade mathematics teaching quality is not high, a significant decline in student achievement What is the reason? I think the following aspects: First and third grade primary school mathematics teaching is the key period.This phase involves more content, Difficulties and steep grades. Third graders recognize the scope of recognition from more than a million expanded to more digits, the concept of number is more abstract; number of operations multiplied by the number of single digits, extended to two or three digits multiplied by multiple Number, and asked to master the theoretical knowledge of the four operations; computational ability of the training content from the mouth, pen calculations to the abacus; application problems from simple two-step application to more complex two-step and three-step application of composite questions. An abstract summary of students