学生在作业中的错误并不能完全避免,但作为教师,却可以在错误发生之前,向学生讲透算理和算法,预防错误的发生。教师通过对学生的错误进行分析和检测,从中找到学生的认知起点,并能准确地定位教学难点,寻找合理的教学过程。下面以苏教版四年级数学下册《乘法分配律》一课中的第二次教学为例,谈谈体会。一、讲透算理,将错误遏制在萌芽中数学教学的本质目标是要培养学生建立和发展分析模式、建构模式、应用模式的能力,从数学本质入手,为学生建构这一模型。乘法分配律是一种数学规律,学生需要经历探究过程,深刻理解算理才 Students’ mistakes in homework can not be completely avoided. However, as a teacher, they can talk to students about algorithms and algorithms to prevent mistakes before they occur. Teachers through the analysis and detection of student errors, to find the cognitive starting point of students, and can accurately locate the teaching difficulties, to find a reasonable teaching process. The following to Sujiao version of the fourth grade mathematics book “multiplication distribution law” a lesson in the second teaching as an example, to talk about experience. First, to explain the truth and to curb the mistakes in the bud The essence of mathematics teaching goal is to train students to establish and develop the analytical model, construction mode, the ability to use the model, starting from the mathematical nature of students to build this model. Multiplication distribution law is a mathematical law, students need to go through the process of inquiry, a deep understanding of arithmetic