《数学课程标准》提出:学生的数学学习内容应当是现实的、有意义的、富有挑战性的,这些内容要有利于学生主动地进行观察、实验、猜测、验证、推理与交流等数学活动。这就要求教师在教学中要创设现实且有吸引力的教学情境,激发学生学习数学知识和解决数学问题的兴趣,促使他们用数学的眼光看待现实问题、结合生活实际学习数学,让间接经验的学习有直接的生活经验作支撑,从而使学生更容易理解、掌握数学知识和技能,促进学生对知识的主动建构。 The standard of mathematics curriculum puts forward that students’ mathematics learning content should be realistic, meaningful and challenging, and these contents should help students take the initiative in mathematics activities such as observation, experiment, speculation, verification, reasoning and communication. This requires teachers to create realistic and attractive teaching situations in teaching, to stimulate students’ interest in learning maths and solving math problems, to urge them to view math problems from a mathematical perspective, Learning has direct experience of life as a support, so that students can more easily understand, master mathematical knowledge and skills, and promote students’ active knowledge construction.