数学教师在教学中,常常会发现这样的情况,每到做计算题时,常常发生本不该错误的状况,包括部分优秀学生,也常常会说:我难题都不会错,总在简单的计算时易发生错误。教师习惯性地把这种情况归类为学生的粗心。因为这些计算题并不是不会做,而是由于轻敌导致注意力不够集中、抄错题、运算粗心、不进行验算检查等造成的,尤其是笔算之后,竖式与横式后面得数不写或错写这种错误顽固存在。一味的批评及反复重复性的训练也得不到 Mathematics teachers in teaching, often find such a situation, every time you make a calculation question, this error should not happen, including some outstanding students, often say: I will not be wrong, always simple Calculation is prone to error. Teachers habitually classify this as a careless student. Because these calculations are not not to do, but due to the lack of attention caused by the enemy focus, copy the wrong title, carelessness, not checking and checking caused, in particular, after the calculation, the vertical and horizontal not write Or wrongly written this stubborn existence of the error. Blind criticism and repeated repetitive training can not be obtained