计算教学是小学数学教学中的重要组成部分,简便计算是计算教学中不可缺少的内容。在计算教学中,培养学生简便计算的意识,可以发展学生的数感,提高学生的计算能力,锻炼学生的思维能力。然而,由于教师的认识不足和学生的理解不透彻,导致学生不能正确、合理、灵活地运用运算定律和运算性 Computational teaching is an important part of elementary mathematics teaching. Simple calculation is an indispensable element in computational teaching. In the calculation of teaching, students develop a simple calculation of consciousness, you can develop a sense of the number of students, improve students ’computing power, exercise students’ thinking ability. However, due to lack of teachers ’understanding and students’ lack of understanding, students can not use the laws of computation and computational accuracy correctly, reasonably and flexibly