培养学生整数、小数、分数的四则计算能力,使学生计算正确、迅速、方法合理、灵活,是小学数学教学的一项重要任务。《新课程标准》中要求学生在计算方面达到“熟练”、“准确”、“会”三个层次。因而,必须重视小学生计算能力的培养。但从学生的检测和平时的作业中我们不难发现,学生在计算时,常常出现各种各样的错误。那 It is an important task for primary school mathematics teaching to train students’ ability of calculating four figures of integers, decimals and scores so that students can calculate correctly and promptly. The method is reasonable and flexible. The New Curriculum Standard requires students to reach the three levels of “Skilled”, “Accurate”, “Will” in the calculation. Therefore, we must attach importance to the cultivation of primary school ability to calculate. However, it is not difficult to find out from the students’ tests and the usual homework that students often make various mistakes in their calculations. that