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纵观近年全国各地的中考数学命题,发现科学记数法是一个重要的考点.在教科书中,科学记数法的定义是:把一个绝对值大于10(或者小于1)的整数记为a×10~x的形式(其中1≤|a|〈10,n为整数),这种记数法叫做科学记数法.它既可以表示较大的数,也可以表示较小的数.在中考中,它往往结合了当前社会上人文、地理、经济、气候、科技等热点问题来设计,主要出现在填空题和选择题中.下面以部分中考题为例剖析科学记数法的常见考点,供参考.
Throughout the recent years, mathematics proposition throughout the country and found that scientific notation is an important test in textbooks, scientific notation is defined as: an absolute value greater than 10 (or less than 1) integer as a × 10 ~ x form (where 1 ≤ | a | <10, n is an integer), this notation is called scientific notation. It can represent either a larger number or a smaller number. , It is often combined with the current social design of humanities, geography, economics, climate, science and technology and other hot issues, mainly in the fill in the blank questions and multiple-choice questions below some of the test questions as an example to analyze the common test of scientific notation, for reference.