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教学目标1.在具体情境中理解“求两数相差多少”实际问题的数量关系,并能正确列式计算。2.通过动手操作,感知“一一对应”的数学思想,体会“求两数相差多少实际问题”的计算方法,进一步理解减法的意义。3.能在生活中发现并提出“求两数相差多少”的实际问题,发展比较、推理的能力,培养交流和应用意识,培养数学学习的兴趣和自信心。
Teaching Objectives 1. In specific contexts to understand the number of “difference between the two numbers ” the number of the actual relationship between the number of questions, and the correct formula. 2. Through the hands-on operation, perceiving “one-to-one correspondence ” mathematical thinking, understand “find the difference between the two number of actual problems ” calculation method to further understand the meaning of subtraction. 3. Can be found in life and put forward “How many differences between the two ”, the development of the ability to compare and reasoning, cultivate the exchange and application of awareness, develop mathematics learning interest and self-confidence.