《义务教育数学课程标准》指出:估算在日常生活与数学学习中有着十分广泛的应用,培养学生的估算意识,提高学生的估算能力,让学生拥有良好得数感,具有重要的价值。随着新课标的施行,在小学数学教学中,估算越来越受到教师的重视。估算虽然是一种估计,但并不是凭空猜想。估算的方法虽灵活多样,但也并非 Compulsory Education Mathematics Curriculum Standard states: Estimation has a very wide range of applications in daily life and mathematics learning. It is of great value to train students ’estimation awareness, improve students’ estimation ability and make students have a good sense of worth. With the implementation of the new curriculum, mathematics teaching in primary schools, more and more estimated by teachers. Although the estimate is an estimate, it is not a guess guess. Although the method of estimation is flexible, it is not