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【片断一】教材:苏教版国标本四年级上册练习三第1题。24)9656)18024)9256)170师:前面我们学习了除数是两位数的除法计算方法,下面来进行一些练习。(出示练习三左边一组题)请同学们笔算一下这组题。生:两人板演,其他学生在自备本上练习。计算完毕同桌互改。师:这两道题在计算上有什么相同之处与不同之处?生1:都是把24看作20来试商。
[A] a piece of teaching materials: Sujiao version of the national standard fourth grade exercises on the first three questions. 24) 9656) 18024) 9256) 170 division: In front of us to learn the divisor is a two-digit division method, the following to carry out some exercises. (Show a group of questions on the left side of Exercise Three) Ask the students to think about this group of questions. Students: Two play board, other students in their own practice on the book. Calculated at the same table each change. Teacher: What are the similarities and differences between the two questions? Health 1: Think of 24 as 20 to try.