Correct answer: The content in the case reflects the characteristics of preschool children's thinking from concrete to abstract. Preschool children's thinking is dominated by images, and their understanding of objects often needs the help of concrete and intuitive materials, but mathematical knowledge is a highly abstract knowledge, which can only be obtained by getting rid of other irrelevant characteristics of specific things. This is in contradiction with the characteristics that children's understanding of mathematical knowledge needs the help of concrete things and is easily influenced by concrete things. This contradiction is more prominent in young children. Children can't get rid of the specific characteristics of things, thus abstracting the quantitative characteristics. This kind of interference caused by the specific characteristics of things will gradually decrease with their understanding of the abstraction of mathematical knowledge. Enlightenment: Children must rely on the influence of specific things to learn mathematics, so teachers should provide children with a variety of learning tools and toys, stimulate children to actively explore, pay attention to the use of a variety of teaching methods, encourage children to operate, and give instructions to children in time.

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