就象美术有“美感”,音乐有“乐感”,语文、英语有“语感”一样,数学有“数感”。何谓数感?简单地说,数感作为一种基本的数学素养,是人对数及数的运算的感觉、感受乃至情感,它可以帮助人们用灵活的方法做出数学的判断和为解决复杂的问题提出有用的策略。它包括将数与实际背景联 Just like art has “aesthetic sense”, music has a “music sense”, and language and English have “a sense of language”, and mathematics has a “number sense”. What is number sense? Simply put, number sense as a basic mathematical literacy, is the feeling, feeling and even emotion of human logarithm and number of operations. It can help people to make mathematical judgments and solve complicated problems with flexible methods. The question presents a useful strategy. It involves linking the number with the actual context