做习题是数学课最常用的训练方式之一,通过练习既可以了解学生对新知掌握情况,又可以诊断教学实施状况。如何最大限度地挖掘练习题的数学价值,有效地促进学生思维发展?下面以一道练习题的拓展为例具体谈谈。【例题】你能在下图平行线间画出与吟ABC面积相等的三角形吗?(人教版五年级上册) Exercises are one of the most commonly used training methods in math class. Through practice, students can understand the students’ knowledge of the new knowledge and diagnose their teaching implementation. How to maximize the mathematical value of the exercises to effectively promote the development of student thinking? The following discussion with an example of the expansion exercises as an example. [Example] Can you draw a triangle with the same ABC area as the parallel lines in the following figure? (PEP fifth grade)