A word-for-word draft of solving equations in primary school mathematics

(A) the introduction of new courses

Teacher: Hello, class! We have learned the meaning of equations before. Who can lead us to review the knowledge about equations? All right, you tell me.

Health: An equation with unknowns is called an equation. To judge whether an equation is an equation, one depends on whether it contains unknowns, and the other depends on whether it is an equation.

Teacher: It seems that this student has a good grasp of what he has learned before. What new knowledge can be inspired by reviewing old knowledge? Today we will continue to learn and solve equations.

(blackboard writing topic)

(B) new curriculum teaching

Teacher: Please look at the big screen. Can you list the equations according to this picture? You tell this classmate.

Health: There are X balls in the box, and there are 3 balls outside the box. One * * * adds up to nine balls. The equation listed is x+3=9.

(blackboard equation)

Teacher: Do you agree with him? The teacher wrote down the equation on the blackboard. So let's think about the value of x? Th5 Think independently first, and then discuss and explore in groups of four for 5 minutes. After the discussion, the group representatives will explain the results. Let's get started.

(patrol)

Teacher: Well, it's time. During the visit, the teacher found that every student actively participated in the discussion. Please invite a group of representatives first, and you will do it.

Health: 6+3=9, x=6.

Teacher: Which group has different methods? Ok, the representatives of three groups raise their hands. What did your team do?

Student: Make use of the properties of the equation and combine the demonstration diagram of Three Zhang Tianping displayed on the big screen to find the value of X. According to the listed equation x+3=9, put X squares and 3 squares on the left and 9 squares on the right of the balance, and the balance is just balanced.

Teacher: To ask for the value of x, you have to make only x squares on the left side of the balance, so in order to keep balance, you have to remove three squares on the left and three squares on the right. What is the basis of your doing this?

Student: According to the nature of the equation, 1, the two sides of the equation subtract the same number, and the left and right sides are still equal. At the same time, this process can be expressed as x+3-3=9-3 in mathematical language. Finally, there are x squares on the left and six squares on the right. The balance is still balanced. Find x=6.

(blackboard writing process)

Teacher: It is very valuable that the representatives of the third group can integrate the demonstration diagram with their own ideas. Now please note that in mathematics, the value of the unknown that makes the left and right sides of the equation equal is called the solution of the equation. Here x=6 is the solution of the equation x+3=9, and the solution of the equation is a value. The process of finding the solution of the equation is called solving the equation, and solving the equation is a process, so when we solve the equation, we should write one first. Solution? In other words, every step in the process is an equation, which cannot be connected. Pay attention to the alignment of equal signs. (blackboard writing)

Teacher: Is x=6 the correct answer? Please try it yourself, or you can teach yourself the test process of the solution of the equation in the textbook, and the students behind will become? Little teacher? Explain.

Health: You can substitute x=6 into the original equation to see if the left and right are equal. If the left and right sides are equal, it means that x=6 is the solution of the equation, otherwise it is not the solution of the equation.

(Blackboard verification process)

Teacher: Your voice is really loud, your calculation thinking is clear, and you have taught me well. There are still some small problems to pay attention to. When writing inspection procedures, write them down first? Check? Two characters, the equal sign should also be aligned. (blackboard writing)

Teacher: Looking at the whole process of solving the equation, who can say that it is divided into several steps? Okay, this female classmate.

Health: Write the equation first, and then write one? Solution? Word, and then use the basic properties of the equation to find the solution of the equation, and finally substitute it into the original equation for testing.

Teacher: Your summary of the steps is really comprehensive. This process can be summarized as a formula: write the equation first, then write the solution, and solve it by using the properties of the equation. If you want to know the right or wrong solution, replace it and write a test.

(3) Consolidation and promotion

Teacher: After learning new knowledge, let's strike while the iron is hot. Please look at the question 1 on the big screen to solve the equation. This classmate is going to perform. Did he do the right thing?

Health: That's right!

Teacher: He uses the equation property 1 to solve the equation. All right, the challenge continues. Question 2, is x=2 the solution of equation 5x= 15?

Health: No, it should be 3.

Teacher: The teacher found that everyone learned to check whether the solution of the equation was correct.

(4) Summarize the homework

Teacher: Who can talk about the gains of this class?

Health: I know what the solution of the equation is; Learn to use the properties of equations to solve equations; He also knows that after understanding the equation, it is necessary to check whether the solution of the equation is correct.

Teacher: The teacher is very happy to see that everyone has learned something. Please review the knowledge of this lesson in time after class, and finish the exercises of questions 3 and 4 after class. That's all for this class. See you after class.

The above is the sharing of the 2020 teacher qualification interview 10 minute example. I hope it will help candidates. If you want to know more about the skills and preparation strategies of teacher qualification examination, you are welcome to pay attention to this platform in time!