在小学数学教学中,概念性的错误常有发生,如把课本比作长方形,把茶杯盖比作圆,容积当体积等等。即使是小学数学课本,也是百密难免一疏,存在一些考虑不周之处,下面举例说明。(本文中的例题均见六年制小学数学课本)。 例1 “把一条线拉紧,就成一条直线。”(示意图略)“在一条线上拴上一块重的物体,用手把线提起来,使线垂下,也成一条直线。”(示意图略) 例1“把一条线拉紧,就成一条直线。”(示意图略)“在一条线上拴上一块重的物体,用手把线提起来,使线垂下,也成一条直线。”(示意图略) In elementary school mathematics teaching, conceptual mistakes often occur, such as comparing textbooks to rectangles, comparing teacup covers to circles, volumes as volumes, and so on. Even elementary school mathematics textbooks are difficult to avoid, and there are some areas of misconduct. Here are some examples. (The examples in this article can be seen in the six-year primary school math textbooks). Example 1 “Tighten a line to make it a straight line.” (Schematic sketch) “Put a heavy object on a line and lift it up by hand so that the line hangs down and becomes a straight line.” (Schematic Slightly) Example 1 “Tighten a line to make it a straight line.” (Schematic sketchy) “A heavy object is placed on a line, and the line is lifted by hand so that the line hangs down and becomes a straight line.” (Schematic diagram omitted)