一、实验课题的提出长期以来,小学数学教学普遍存在着“耗时多,负担重,效益低”的现象,严重制约了教学质量的提高,尽管每位数学老师都重视计算教学和对学生计算能力的培养,然而学生的学习效果并不尽如人意,调查统计资料表明:小学生在计算学习中主要存在三个方面的问题,即:会算,但正确率不高;会算,但速度不快;会算,但繁而不活。而这些问题的产生其根本原因则在于数 First, the proposed experimental topics For a long time, primary school mathematics teaching ubiquitous “time-consuming, heavy burden, low efficiency,” the phenomenon has seriously hampered the improvement of teaching quality, although each math teacher attaches importance to teaching and computing However, the learning results of students are not satisfactory. Survey statistics show that there are three main problems in primary school students’ learning in computation, that is, they will calculate but the accuracy is not high; Unpleasant; will count, but complicated and not alive. The root cause of these problems lies in the number