教学一元一次不等式教到不等式的应用时,发现苏科版数学七年级下册新教材在例题解答中,对题目中“至少”是多少或“最多”是多少设未知数时,全部写为“至少是x”或“最多是x”.笔者觉得这样设未知数,列出的不等式就有问题.现以其中的一道例题为例来分析,希望能引起教材编者的重视.例题(苏科版数学七年级下册第131页问题1):一只纸箱质量为1kg,放入一些苹果后,纸箱苹果的总 Teaching inequality once taught the application of inequality, we found that Su Ke version of the seventh grade of the new textbook in the sample solution, the question is “at least ” is the number or “most ” is the number of unknowns, all Written as “at least x ” or “up to x ” .I think this set unknown, listed inequalities have problems.With one of the examples as an example to analyze, I hope can cause the textbook editor’s attention . Example (Su Keji seventh grade of mathematics under the issue of the first 131) 1): a carton quality of 1kg, after putting in some apples, the total amount of carton apple