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1.讲清长方体和正方体体积公式的由来。长方体和正方体体积公式的由来,是“长方体和正方体”教学中的一个重要问题。为讲清这一问题,我们可用教具或学具中的一百个小立方块,让学生摆出各种不同的长方体,并从它们的长、宽、高的数量,与立方体实际块数的关系中,去发现长方体的体积,就是该长力体长、宽、高的乘积。正方体体积公式的由来,则应在学生理解长方体体积公式的基础上,发挥知识的迁移作用,启发学生自己寻找出来,然后,再从小立方块的拼摆中去加以验证。这样,学生对于长方体和正
1. Clarification of the origin of cuboid and cuboid volume formulas. The origin of cuboid and cube volume formulas is an important issue in the teaching of “cuboids and cuboids”. To clarify this issue, we can use a hundred small cubes in teaching aids or learning aids to give students a variety of different cubes, and from their length, width, height, and the actual number of cubes Relationship, to find the cuboid volume, is the length of the body length, width, height of the product. The origin of cube volume formula should be on the basis of the students to understand the cuboid volume formula, to play the role of knowledge transfer, to inspire students to find out, and then, to verify from the small cube patchwork. In this way, students are right for the cuboid and positive