口算是不借助任何工具,只凭思维和语言进行计算并得出结果的一种计算方法,它具有快速、灵活的特点。同时,口算既是笔算、珠算、估算和简便计算的基础,也是计算能力的重要组成部分,它对培养学生的计算能力和发展学生的思维能力都起着十分重要的作用。口算教学贯穿于小学数学教学的全过程,在小学阶段口算是相当的重要。所以在小学数学教学中,口算始终是一项基本的任务,必须予以重视。要提高口算能力,关键还是个“练”字:要练好高密度的视算, Mouth counting is not a tool with any, just thinking and language calculations and the results of a calculation, it has a fast, flexible features. At the same time, accounting is not only the basis of pen calculation, abacus, estimation and calculation, but also an important part of calculation ability. It plays a very important role in cultivating students ’calculation ability and developing students’ thinking ability. Oral teaching runs through the whole process of primary school mathematics teaching, accounting at primary school is quite important. Therefore, in primary school mathematics teaching, accounting is always a basic task that must be taken seriously. To improve the ability to account, the key is a “practice ” word: to train high-density calculations,