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初中数学《不等式与不等式组》内容中有一道经典题:题1已知关于x的不等式k-x+6>0的正整数解为1、2、3,求k的取值范围.本题对于学生来说有一定难度.为提升学生的探究能力,笔者在教学中采取了强化数学思想、落实解题方法的策略,使学生较好地掌握了这类问题的解决方法.首先引导学生思考:什么叫含字母系数的不等式k-x+6>0的正整数解?其正整数
There is a classic problem in the junior middle school mathematics “inequalities and inequalities group”: Question 1 Knowing that the positive integer solution of k-x+6>0 for x is 1, 2, 3, find the value range of k. For students, there is a certain degree of difficulty. In order to improve students’ exploration skills, the author adopted a strategy of strengthening mathematics thinking and implementing problem-solving methods in teaching, so that students can better grasp the solution to such problems. First, guide students to think about: What is the positive integer solution of the inequality k-x+6>0 with the letter coefficient? Its positive integer