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我国著名教育家陶行知先生曾经说过:“动手最重要,这个东西能创造一切。”心理学家也认为:“智慧处于手指上。”因此,在数学学习中,要学会动手操作。通过剪、拼、量、做、画等手段,使眼、耳、口、手和脑等各种感觉器官协调动作,感知数学问题,获取数学知识,从而培养学生的数感。一、在动手操作中理解数学概念,培养数感小学生是按照“感知—表象—概念”这一规律学习知识的。通过动手操作,可以强化感性认识,为建立清晰而正确的概念打下基础。如,在学习“千克”这一概念时,可以先称出1千克中的物体,再用手掂掂,就可以感受1千克的重量,从而加深对“千克”这一概念的认识。又如,在学习“米”“分米”和“厘米”时,可以剪一剪、摸一摸1米、1分米和1厘米的小棒的实际长短,再量一量1米里面包含多少个1分米,1分米里包含多少个1厘米。在学习“毫米”时,可在三角板或塑料尺上数一数
Mr. Tao Xingzhi, a famous educator in our country, once said: “The most important thing to do is to create everything.” Psychologists also think: “Wisdom lies on the finger.” Therefore, in mathematics study, we must learn Hands-on operation. Through the means of scissors, spell, quantity, painting and drawing, the various sensory organs such as eye, ear, mouth, hand and brain are coordinated with each other to sense mathematical problems and acquire mathematical knowledge so as to cultivate the sense of number of students. First, understand the concept of mathematics in the hands-on operation, raise the sense of number sense Primary school students learn knowledge according to the law of “perception - appearance - concept ”. Through hands-on exercises, you can enhance perceptual knowledge and lay the foundation for a clear and correct concept. For example, when learning the concept of “kilogram”, you can first weigh an object in a kilogram and then use it to feel the weight of a kilogram so as to deepen the concept of “kilogram” understanding. In another example, when learning “rice”, “decimeter” and “cm”, you can cut the actual length of the small sticks of 1 meter, 1 meter and 1 cm, How many 1 decimeter is contained within 1 meter and how many 1 cm is contained within 1 decimeter. When learning “mm”, count on a set square or plastic ruler