“分类”是一种逻辑思考方法,它是指把一个概念的外延分为几个小类的逻辑方法。具体分时往往是根据事物的某一本质属性或某一规律来加以分类的。用这种思考方法解答小学数学中的某些思考题,既能较快地找到正确的答案,也利于培养小学生的初步的逻辑思维能力。在小学数学教学乃至小学生在运用这种方法时,往往出现思路不清,层次不明,逻辑思维不严密,计算时容易产生重复和遗漏的错误。笔者认为有几个关键问题值得引起重视。 “Classification” is a logical method of thinking, which refers to the logical method of dividing a concept's extension into several subcategories. Specific time-sharing is often based on a certain nature of things or a certain law to be classified. Using this way of thinking to answer some of the questions in primary school mathematics can not only find the correct answer faster, but also help cultivate the primary logical thinking ability of primary school students. When primary school mathematics teaching and even primary school students use this kind of method, often there are mistakes with unclear ideas, unclear levels, unclear logical thinking and repetition and omission in calculation. I think there are several key issues worthy of attention.