计算是人们生活中应用最多的数学知识,也是小学数学教学的重要内容。近几年,随着“数感培养”、“算法多样化”、“发展学生素养”等因素的融入,计算教学给部分教师带来了观念上的冲突,从而也导致教师计算教学行为的各异。本文以三位教师“除数是小数的除法”一课不同的教法为例,思考他们教学背后的取舍之道,选择之因,分析当前计算教学的不同价 Computation is the most commonly used mathematical knowledge in people’s lives and is also an important part of elementary mathematics teaching. In recent years, with the integration of such factors as “number sense training ”, “algorithm diversification ” and “developing student accomplishments ”, calculation teaching has brought some concept conflicts to some teachers, Teachers calculate the differences in teaching behavior. In this paper, taking the three teachers’ teaching methods of division of divisors and decimals as an example, we consider the trade-offs behind their teaching, the reasons for choosing them, and the different prices of the current computing teaching