[案例背景]在初中数学的作业批改中,我发现学生最容易出错的就是计算题,其中,既有抄错数字、符号、小数点等类型,也有对计算法则没有掌握而导致的错误。仔细想想,每位学生从进小学开始就没有离开过计算训练,但是学生总是在计算上面出现这样或者那样的错误。作为老师的我们,也为如何提高学生计算的准确率进行着教学改进。但是,如果要求计算训练的题型面面俱到,作业量就会自然变 [Case Background] In the middle school mathematics homework revision, I found that students are the most prone to error is the calculation of the problem, in which both the wrong numbers, symbols, decimals and other types, but also did not grasp the calculation algorithm is not caused by the error. Think about it, each student from the beginning of elementary school did not leave the calculation training, but students always appear in the calculation of one way or another mistake. As a teacher, we also make teaching improvements on how to improve the accuracy of student calculations. However, workloads naturally change if there is more than one type of training required