动手能力是智力的重要组成部分,小学数学教学应该重视培养学生的动手能力.通过让学生自己动手操作,可以使学生对所学知识加深理解,促使他们运用书本知识解决实际问题如教学锐角、钝角、平角、周角的认识时,为了使学生较深刻地理解几种角的概念,可让学生用三角板分别拼出一个120°、75°135°的角,也可用 Practical ability is an important part of intelligence, primary school mathematics teaching should focus on developing students' practical ability by allowing students to do it yourself, can make students deepen their understanding of knowledge, to promote their use of book knowledge to solve practical problems such as teaching acute angle, obtuse , Flat angle, Week angle of understanding, in order to enable students to better understand the concept of several angles, allowing students to use a set square respectively spell a 120 °, 75 ° 135 ° angle, can also be used