“笔算除法”是计算教学中的重点和难点。也是教师教学的老大难。许多教师都曾有“为什么笔算除法老是教不会”的困惑。学生在学习《除数是一位数的笔算除法》时,经常出现这样或那样的错例。有些错误即使教师一再强调,学生的错误还是层出不穷。学生学不会的原因究竟是什么?笔算除法到底应该怎么教?一、前测,寻找存在问题为了寻找学生在学习《除数是一位数的笔算除法》中的障碍,我做了前测,发现在笔算 “Pen calculation division ” is the calculation of teaching the focus and difficulty. Teacher education is also a chronicity. Many teachers have had the confusion of why the pen should never be taught. Students learning this “one-digit divisor division method”, one or more examples of such errors often occur. Some mistakes Even if the teacher repeatedly stressed that the student’s error is still emerging. What should be the reason why students can not learn? What should I do if the calculation should be divided in the first place? I. Pre-test and finding the existing problems In order to find the obstacle for students to learn the " Found in the pen calculation