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一、缘起教学整数四则混合运算时有一题,让学生根据分步改为综合算式。批改作业的时候,发现大部分学生出现错误。错误率近七成,为什么会有这么高的错误率,笔者带着疑问,整理成文,望得到同行的指点。二、错误现象列举原题呈现:把100÷25=4,6+4=10,12×10=120这三道算式合并成为一道综合算式。此类型的题目考查学生感受到分步与综合算式之间的联系,提高学生掌握运算的顺序,形成必要的
First, the origin of teaching Integer four mixed operation when there is a question, so that students according to step by step into a comprehensive formula. When correcting homework, I found that most students made mistakes. The error rate of nearly Qicheng, why there is such a high error rate, the author with questions, organize the written, hope to get peer guidance. Second, the wrong phenomenon cited the original presentation: The 100 ÷ 25 = 4,6 +4 = 10,12 × 10 = 120 The three formula merged into a comprehensive formula. This type of problem examines how students perceive the connection between step-by-step and comprehensive formulas, and improves the students’ mastery of the order of operations to form the necessary