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文字题是小学数学的重要内容之一,列式解答文字题既能帮助学生更好地理解四则混合运算,运用知识和技能去解决实际问题,又能培养学生思维能力.老师在讲解这类型题目时,学生容易接受,但让他们做起来往往就做错.原因何在呢?我认为学生列式解答文字题时,主要是对除、除以等数学术语理解差的结果,例如:162÷35-17;第二种是162÷(35-17);第三种(35-17)÷162.
Text problem is one of the important contents of elementary mathematics. The problem-solving essay questions help students to understand the four mixed arithmetic, use knowledge and skills to solve practical problems, and train students' thinking ability. Students accept it easily, but they often make mistakes when they do it. What is the reason? In my opinion, when classifying students' answers to a written question, they are mainly about the result of dividing, dividing by, and other mathematical terms, for example: 162 ÷ 35 -17; the second is 162 ÷ (35-17); the third (35-17) ÷ 162.