有的家长说:“我的孩子一二年级数学成绩很好,可到了三四年级成绩突然下降,不知如何是好?”有的家长甚至恨铁不成钢,经常打骂孩子。我分析小学中年级学生数学成绩下降主要原因有这样几条:一是由于教材难度突然加大造成的,一二年级数学课是基础教学,学生容易掌握,不容易出错。而到三年级就不同了,比如计算一道题:378×562,要进行二十次口算。若其中一步错了,就会全错。四年级的应用题,都是三步、四步、五步运算,学生感到难度大。二是因为 Some parents said: “My child a good grade two or four math, can be a sudden drop in grade three or four grades, I do not know how to do? ” Some parents even iron steel, often scolding children. My analysis of primary school mathematics grade drop in primary students there are several reasons: First, due to a sudden increase in difficulty caused by textbooks, sophomore math class is basic teaching, students easy to grasp, not easy to make mistakes. To the third grade is different, such as calculating a question: 378 × 562, to be twenty times. If one of the wrong steps, it will be all wrong. The fourth grade application questions are three-step, four-step, five-step computing, students feel difficult. Second, because