现在中学生求方根几乎全靠查表。《教参》对平方根表和立方根表的教学,建议安排4-5课时,可见这部分教材的地位是比较重要的。对于这两个方根表,在教学初期,只要坚持要求学生每小题都按课本上的格式书写,学生是能依样画葫芦,正确地完成作业。但是,一旦到平(立)方表、平(立)方根表的综合应用时,求方根可以不象例题那样详细的书写过程时,错题率就大大增高了。主要错 Now the middle school student asks the root almost entirely by looking up the table. The teaching of the Teaching Reference on square root tables and cube root tables suggests that 4-5 hours of class time are available, showing that the status of this part of the teaching materials is more important. For these two square root tables, in the early stage of teaching, as long as the students are required to write in every format according to the format of the textbook, the students can follow the example and finish the assignment correctly. However, once it is applied to the integrated application of the square table and the square root table, the square root can not be written as detailed as the example, and the wrong question rate is greatly increased. The main mistake