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估算,在日常生活中是常见的学习方法。因为很多问题只能知道大概的结果,很难算出准确的结果,就要用估算的方法来解决。因此,估算受到教师和学生的重视。怎样增强学生的估算意识,让学生掌握简单的估算方法,帮助学生运用数学思维观察社会,分析社会,解决日常生活问题,培养学生的数感和数学应用意义都具备积极的含义。《国家课程标准》在课程建议中指出“:估算在日常生活中有着十分广泛的应用,在教学中,教师要
Estimating is a common learning method in everyday life. Because many problems can only know the approximate result, it is difficult to calculate the accurate result, we must use the estimation method to solve it. Therefore, the estimation is valued by teachers and students. How to enhance students ’sense of estimation, to help students master a simple estimation method, to help students use mathematical thinking to observe the society, analyze the society, solve the problems of daily life, cultivate students’ sense of number and significance of mathematical application have a positive meaning. The National Curriculum Standard states in the course proposal that ”estimation has a very wide range of uses in everyday life. In teaching, teachers