1. impart knowledge
Learning is an internal activity of students, and mathematical knowledge can only be obtained through students' own learning.
(1) The story of addition, subtraction, multiplication and division
? Mr. Wu asked the students to look for the story of "8+4 = 12" with the help of the existing experience, "create (problem) situations" to let the children tell stories, and introduce the relationship between the part and the whole from the addition and subtraction of senior one. "Let the students use their brains and speak with their mouths (both use their brains) to make the story of multiplication and division clear.
(2) The meaning of addition, subtraction, multiplication and division.
? Based on the story, this paper studies the significance of addition, subtraction, multiplication and division, and leads to the discussion of the whole and parts, several parts and several identical parts. Using their relationship, children can naturally draw the conclusion that multiplication is addition, division is subtraction, and addition, subtraction, multiplication and division are all about the relationship between parts and whole, whole and part. By using integer addition, decimal addition and decimal addition, what is the counting unit is clear, so as to know the alignment of numbers and decimal points. According to the characteristics of mathematics discipline (abstract, systematic and rigorous) and children's thinking characteristics (mainly thinking in images, gradually transitioning to abstract thinking), Mr. Wu scientifically summarized and revealed the basic laws of primary school mathematics teaching.
Enlighten wisdom
British philosopher White once said: Cognitive education must impart knowledge. However, there is something more vague than knowledge, but greater than knowledge, which occupies a dominant position in the educational process. People call it wisdom. Wisdom is closely related to knowledge, which is based on knowledge and higher than knowledge. Knowledge and wisdom cannot be equated, but knowledge can be transformed into wisdom under certain conditions.
Teacher Wu Zhengxian said: "In mathematics teaching, it is important not only for students to learn knowledge and solve problems, but also for them to master the" key "of learning, learn to study, learn to think and learn to create. Through the study of this lesson, children not only understand the meaning of counting unit, the relationship between the whole and the part, the relationship between addition, subtraction, multiplication and division, but also learn to refine the key points in their minds, learn to attend classes, and learn to explore the internal and external relations between knowledge! It is the truth that it is better to teach people to fish than to teach people to fish!
Finally, Mr. Wu summed up the lesson by saying, "If students have this map in mind, it will definitely help you in your future study." As Mr. Wu said, children are not only natural people, but also social people. When children grow up, they must integrate into society. So let them learn to be independent, to cooperate, to live and to be human!
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