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《数学课程标准》强调,学生是教学活动的主体,要给学生以足够的时间和空间去操作、观察、猜想……“有效的数学学习活动不能靠单纯地依赖模仿和记忆,动手实践、自主探索与合作交流是学生学习数学的重要方式。”小学低年级学生年龄小,生活经验少,感性知识不丰富,理解抽象、枯燥的数学概念有一定的难度；加上学生有意注意的时间短,学习活动难以持久地顺利展开。所以在教学中,教师要为学生提供丰富的观察、操作的机会,创设让学生参与操作活动的条件,来增加学生的感性认识,积累感性经验；设计有趣的游戏活动,激发学生参与学习的热情。让学生在“动”中感知,在“动”中领悟,在“动”中发挥创新的潜能,在“动”中激发学习的兴趣,培养学生的动手操作能力、观察能力及合作意识,引导学生自主学习。
“Mathematics Curriculum Standard” emphasizes that students are the main body of teaching activities, to give students enough time and space to operate, observe, guess ... ... “Effective mathematics learning activities can not rely solely on imitation and memory, hands-on practice, autonomy Exploration and cooperation and exchange is an important way for students to learn mathematics. ”The lower primary school students are young, have little life experience and are not rich in perceptual knowledge. It is difficult to understand the abstract and boring mathematics concept. Coupled with the short attention period of students, Learning activities are difficult to carry out smoothly and sustainably. Therefore, in teaching, teachers should provide students with abundant observation and operation opportunities, and create conditions for students to participate in operational activities to increase students ’perceptual knowledge and accumulate emotional experience; to design interesting game activities and stimulate students’ enthusiasm for participation in learning . Let students perceive in “move”, realize in “move”, exert the potential of innovation in “move”, stimulate the interest in learning in “move”, train the students’ hands-on ability, observation ability and sense of cooperation, guide Students learn independently.