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九年义务教育三年制初中教科书代数第一册(上)P10中指出:“把问题中与数量有关的词语,用含有数、字母和运算符号的式子表示出来,就是列代数式”.上述定义通俗的理解就是:把用文字语言叙述的数量关系“翻译成”代数式.由于对问题中字母的意义及数量关系理解不透,初学者往往会出现这样那样的错误,影响后续内容的学习.下面将一些常见的错因剖析如下,供参考.
In the first year (first) P10 of the three-year compulsory education three-year compulsory school textbooks, it is stated that: “The number-related words in the question are expressed by formulas containing numbers, letters, and arithmetic symbols, which are column algebraic formulas.” The definition of popular understanding is to “translate” the quantitative relationship described in the textual language to algebraic expressions. Because of the incomprehensible understanding of the meaning and quantity relationship of letters in a problem, beginners often have such mistakes and influence the learning of follow-up content. Here are some common causes of error analysis below, for reference.