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笔者在听课中,了解到一位七年级数学教师对一道新课程课后习题的讲解情况,产生诸多思考,遂写下拙文.题目如下:求(2-1)(2+1)(2~2+1)(2~4+1)…(2~(32)+1)+1的个位数.[七年级下册北师大版.第57页.第6题]一、教法及变式延伸(1)求(2-1)(2+1)(2~2+1)(2~4+1)…(2~(32)+1)+1
In lectures, I learned a seventh grade mathematics teachers on a new course after-school exercises to explain the situation, have a lot of thinking, then write the clumsy.The title is as follows: Seeking (2-1) (2 +1) (2 ~ 2 + 1) (2 ~ 4 + 1) ... (2 ~ (32) +1) +1 single digits. [Grade seven under the North Normal University Edition. And (2) (2 + 1) (2 ~ 2 + 1) (2 ~ 4 + 1) (2 ~ (32) +1) +1