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估算,是人们在日常生活、工作和生产中,对一些无法或没有必要进行精确计算的数量,进行近似或粗略的估计的一种方法。估算是计算能力的重要组成部分,在日常生活中,处处有计算,也处处离不开估算。无数的事例证明:一个人在一生的活动中估计和、差、积、商的次数,远比进行精确计算的次数多得多,重视加强估算已成为一个世界性的潮流,估算能力的培养已成为提高学生素养的一个重要方面。《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,发展学生的估算能力,
Estimation is a method by which people make approximate or rough estimates of the quantities that can not or need not be accurately calculated in their daily life, work and production. Estimation is an important part of the ability to calculate. In everyday life, there are calculations everywhere, and estimates are everywhere. Numerous examples show that a person’s estimation of sum, difference, product, and quotient in a lifetime’s activities is much more numerous than the exact calculation, and emphasis has been placed on strengthening the assessment that training has become a worldwide trend, Become an important aspect of improving student literacy. ”Mathematics Curriculum Standard“ states: ”Estimation has a very wide range of applications in daily life and mathematics learning, training students in the sense of estimation, the development of students’ estimation ability,