学生的计算能力低下是个老生常谈的问题,笔者在教学人教版三年级下册第二单元“除数是一位数的除法”时,学生的错误百出,特地为三A-三D班共174位学生做了纯计算测试。一、情况分析口算共20题。1.常见错误(:1)积或商的末尾忘记添0;(2)粗心造成乘除号看错;(3)口诀不熟,计算错误。2.原因分析:口算不熟练。这块内容较为简单,因此,也是老师和学生容易忽视的。在新课教学时,很多学生都是运用了“末尾添0法”来做,这本应该是个容易理解的方法,但由于学生对口算的 The low computational ability of students is a cliché problem, the author in teaching PEP third grade second unit “divisor is the one-digit division ”, the student’s mistakes, specially for the three A-three D classes 174 students did a pure calculation test. First, the situation analysis Mouth count a total of 20 questions. 1 common mistake (: 1) forgot to add 0 at the end of the product or quotient; (2) Careless mistakes caused by multiplication and division; (3) misunderstood formula, calculation error. 2. Analysis of the reasons: port count unskilled. This piece of content is relatively simple, therefore, is also easily overlooked by teachers and students. In the new class teaching, many students are using “tail Tim 0 law ” to do, this should be an easy to understand method, but because of the students to count