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《数学课程标准》提出:“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,发展学生的估算能力,让学生拥有良好的数感,具有重要的价值。”因此,教师应在教学过程中把握各种时机对学生进行估算能力的培养,使学生在估算过程中渐渐把握数的大小,使数感得到深化。那么,如何更好地培养学生良好的估算意识,发展学生的估算能力,让学生拥有良好的数感呢?
The Mathematics Curriculum Standard states: “Estimation has a very wide range of applications in daily life and mathematics learning. It is of great value to develop students ’estimation awareness, develop students’ estimation ability and give students a good sense of number.” " Therefore, teachers should grasp the various opportunities in the teaching process to train students’ ability to estimate, so that students gradually grasp the size of the number in the estimation process to deepen the number of flu. So, how to better develop students ’good estimation awareness, develop the students’ estimation ability, so that students have a good sense of number?