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李康康同学学习究科学记数法之后,颇有心得,让我们一起来欣赏吧.心得1准确确定科学记数法中的“a”.科学记数法是一种特定的记数方法,在其标准形式a×10~n中,1≤|a+<10,这一点应把握.心得2准确确定科学记数法中的“n”.在用科学记数法表示一个大数时,10的指数n等于小数点向左移动的位数.心得3科学记数法与精确度的关系.在确定精确度时,应先将其写成一般记数形式,然后再根据“×”前面的末位数字所在的数位确定.
Li Kangkang students learn science notation, quite experience, let us appreciate it. Experience 1 accurately determine the scientific notation in the “a ”. Scientific notation is a specific counting method, In its standard form a × 10 ~ n, 1 ≤ | a + <10, it should be grasped .Interaction 2 Accurately determine the scientific notation “n ”. In the scientific notation of a large number , 10 index n is equal to the number of digits to the left of the decimal point. Experience 3 scientific notation and accuracy of the relationship in determining the accuracy, it should be written as a general count form, and then according to " The last digit of the last digit is determined.