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同学们在初学科学记数法与近似数时,由于对概念理解得不透彻或考虑问题不全面等原因,容易走入解题误区,造成解题失误.下面就同学们常犯的错误加以分析,希望对同学们有所帮助.一、近似数的精确度问题1.用科学记数法表示的近似数例1据统计,2010年某市人均GDP约为4.49×104元,近似数4.49×104精确到______位.错解:精确到百分位.剖析:对于用科学记数法所表示的数,判断
Students in the beginner's scientific notation and approximate number, due to the concept of understanding is not thorough or consider the problem is not comprehensive and other reasons, easy to enter the problem-solving errors, resulting in problem-solving errors. Below the students often make mistakes to be analyzed , I hope to help students.A first, the precision of approximate number of 1. Approximate number by scientific notation 1 According to statistics, in 2010 the city's per capita GDP is about 4.49 × 104 yuan, the approximate number of 4.49 × 104 accurate to ______ bit wrong solution: accurate to the percentile Analysis: for the number expressed in scientific notation to determine