背景最近,我们在教学调研中对学生的学习情况进行了书面调研,并对学生的答卷情况进行了统计和评析。老师们都不约而同得出一致的结论:学生很粗心,很毛躁。具体表现为:一道计算题,列竖式计算时,竟然把数字抄错;卷面上竟然有题目空着不做;应用题计算方法对了,计算却出错了;平时练过数遍的题目再一次做错……。这些错误简直让教师悲伤又“绝 Background Recently, we conducted a written survey of student learning in teaching research and conducted statistics and reviews on students’ responses. The teachers unanimously reached the same conclusion: the students were careless and impatient. Specific performance as follows: a calculation of the title column vertical calculation, even the number of the wrong copy; even the surface of the volume is not empty title; calculation method of the problem, the calculation is wrong; usually practiced several times the title Do it again ... These mistakes simply let the teacher sad and ”absolutely