Knowledge points of second grade mathematics volume 1 unit

It is better to preview the Buddha's feet in class before class. It is better to prepare for the lesson before class than to do it at the last minute in class. In fact, it is the same for any subject. To learn any subject, diligence is the best learning method, no one. Below are some knowledge points for second grade mathematics that I have compiled for you. I hope it will be helpful to you.

Mathematics knowledge points for the second grade of primary school

Addition table:

1 1=2

1 2=3　2 2=4

1 3=4　2 3=5　3 3=6

1 4=5　2 4=6　3 4=7　4 4=8

1 5=6　2 5=7　3 5=8　4 5=9　5 5=10

1 6=7　2 6=8　3 6=9　4 6=10　5 6=11　6 6=12

1 7=8 2 7=9 3 7=10 4 7=11 5 7=12 6 7=13 7 7=14

1 8=9 2 8=10 3 8=11　4 8=12　5 8=13　6 8=147 8=15　8 8=16

1 9=10　2 9=11　3 9=12　4 9=13　5 9=14 6 9=157 9=168 9=17　9 9=18

Subtraction formula table:

1-1=0

2-1=1　2 -2=0

3-1=2　3-2=1　3-3=0

4-1=3　4-2=2　4-3=1　4- 4=0

5-1=4 5-2=3 5-3=2 5-4=1 5-5=0

6-1=5 6-2 =4　6-3=3　6-4=2　6-5=1　6-6=0

7-1=6　7-2=5　7-3=4　7-4=3　7 -5=2　7-6=1　7-7=0

8-1=7　8-2=6　8-3=5　8-4=4　8-5=3　8-6= 2　8-7=18-8=0

9-1=8　9-2=7　9-3=6　9-4=5　9-5=4　9-6=3　9-7 =29-8=1　9-9=0

10-1=9　10-2=8　10-3=710-4=6　10-5=5　10-6=4　10-7 =310-8=210-9=1 10-10=0

Second grade mathematics learning methods

1. Preview, lectures, review and homework methods

The learning methods that are suitable for mathematics classroom teaching are the basic methods of preview, listening to lectures, review, and homework methods.

1. Preview method

Preview is to read the upcoming mathematics content before class, understand its outline, and be aware of it so that you can take the initiative in listening to the class. Preview is an attempt at independent learning. Whether you understand the learning content correctly, grasp its key points and key points, and gain insight into the implicit thinking methods can be tested, strengthened or corrected in time during the lecture, which is conducive to improving learning ability and Develop the habit of self-study, so it is an important part of mathematics learning.

Mathematics has strong logic and coherence, and new knowledge is often based on old knowledge. Therefore, when previewing, you need to find out the knowledge needed to learn new knowledge, and recall or review it again. Once you find that you have not mastered the old knowledge well, or even do not understand it, you must take timely measures to make up for it and overcome the reasons for not mastering it well. or forgetting, creating conditions for smooth learning of new content.

In the preview method, in addition to recalling or reviewing the old knowledge (or preparatory knowledge) needed to learn new content, you should also understand the basic content, that is, know what to talk about, what problems to solve, and what measures to take. What method, what are the key points, etc. When previewing, you generally use the method of reading, thinking, and writing to underline or mark the key points, levels, and connections of the content, write down your own opinions or unclear points and problems, and finally determine what to solve during the lecture. main issues or plans to improve the efficiency of listening to lectures. In terms of time arrangement, preview is usually done after review and homework. That is, after completing the homework, read over the content to be learned in the next class, and the requirements can be flexibly grasped according to the specific situation at that time. If time permits, you can think more about the questions, delve deeper, and even do exercises or exercises; if time does not permit, you can have fewer questions and leave more questions to be solved by listening to the lectures, so there is no need to insist on uniformity.

2. Method of listening to lectures

Listening to lectures is the main form of learning mathematics. By studying under the guidance, inspiration, and help of teachers, you can avoid detours, reduce difficulties, and acquire a large amount of systematic mathematical knowledge in a short period of time. Otherwise, you will get twice the result with half the effort and it will be difficult to improve efficiency. So listening to lectures is the key to learning mathematics well.

When listening to lectures, in addition to clarifying the tasks in the preview and solving problems that suit you in a targeted manner, you must also concentrate on keeping up with the teacher's lectures and start thinking. Brain, thinking about how teachers ask questions, analyze problems, and solve problems, especially learn mathematical thinking methods, such as observation, comparison, analysis, synthesis, induction, deduction, generalization, specialization, etc., that is, how to use formulas and theorems, Understand the underlying thinking.

When listening to the class, on the one hand, you should understand what the teacher said and think or answer the questions raised by the teacher. On the other hand, you should think independently and identify what knowledge you have understood and what you still have questions or new questions. , and have the courage to put forward their own opinions. If it is impossible to solve the problem in class, you should write down the question or problem and leave it to be solved by yourself or ask the teacher for advice. Continue to listen to the teacher's lecture attentively. Don't let your thinking stop here just because you don't understand it, which will affect the rest of the class. of lectures. Generally, when listening to a class, you should write down the key points, supplementary content and methods of the teacher's lecture for review.

3. Review method

Review is to re-study the mathematical knowledge learned in order to achieve the purpose of in-depth understanding, integration, refinement and generalization, and firm grasp. Reviewing should be closely connected with listening to lectures, while reading textbooks, recalling lecture content or checking class notes, and solving existing knowledge deficiencies and questions in a timely manner. Be sure to understand and master the content you are studying. If some problems cannot be solved after a long period of thinking, you can discuss them with your classmates or ask the teacher to solve them.

Review should also be based on understanding the teaching materials, communicating the internal connections between knowledge, finding out the key points and key points, and then refining and summarizing them to form a knowledge system, thereby forming or developing an expanded mathematical cognitive structure.

Review is a process of deepening, refining and summarizing knowledge. It requires active and active activities of the hands and brain. Therefore, in this process, it provides an excellent opportunity to develop and improve abilities. Chance. Mathematics review cannot just be about reviewing and memorizing the knowledge you have learned, but you should also think hard about how new knowledge is generated, how it is developed or proved, what its essence is, how to apply it, etc.

4. Homework methods

Mathematics learning is often done through homework to consolidate knowledge, deepen understanding and learn to apply it, thereby forming skills and skills, and developing intelligence and mathematics. ability. Since the homework is completed independently on the basis of review, it can check the mastery of the mathematical knowledge learned and the level of ability. Therefore, it is often useful for discovering existing problems, difficulties, or when there are many wrong questions. It indicates that there are defects or problems in the understanding and mastery of knowledge, which should arouse vigilance and the causes need to be identified and solved as soon as possible.

Usually, mathematics homework is expressed as problem solving, and problem solving requires the application of learned knowledge and methods. Therefore, before doing homework, you need to review it first and base it on a basic understanding and mastery of the textbooks you have learned. Otherwise, you will get half the result with half the effort, waste your time, and not get the desired effect.

To solve problems, you must follow certain procedures and steps. First of all, you must clarify the meaning of the question, read the question carefully, and understand the meaning of the question carefully. For example, which are the known data and conditions, which are the unknowns and conclusions, what operations are involved in the question, how they are related to each other, whether they can be represented by pictures, etc., etc., must be carefully considered and thoroughly understood. clear.

Secondly, on the basis of clarifying the meaning of the question, explore ways to solve the problem and find out the connection between the known and the unknown, conditions and conclusions. Recall related knowledge methods, examples learned, problems solved, etc., and from form to content, from known numbers and conditions to unknown numbers and conclusions, consider whether their results or methods can be used, and whether appropriate assistance can be introduced After using the elements, can we find a special problem or a similar problem related to the problem, and examine how solving them can enlighten the current problem; can we separate them, examine or change them part by part, and then recombine them to achieve the desired result? Ask for results, etc. That is to say, in the process of exploring and solving problems, it is necessary to use a series of methods such as association, comparison, introduction of auxiliary elements, analogy, specialization, generalization, analysis, synthesis, etc., and learn this series of exploration methods from solving problems.

Third, according to the solution solution obtained through exploration, describe the solution process in accordance with the required writing format and specifications, and strive to be simple, clear, and complete. Finally, we need to review the problem solving, check whether the answer is correct, whether each step of reasoning or operation is well-founded, and whether the answer is exhaustive; think about whether the problem-solving method can be improved or whether there is a new solution, and whether the result of the problem can be Generalization (in fact, many topics in middle school textbooks can be generalized), etc., and summarize the experience of problem-solving, then develop and improve the thinking methods of problem-solving, and summarize things with regularity.

Mathematics lesson plan for the second grade of primary school

"Understanding hundreds and tens"

1. Create situations and introduce new lessons

Show life Scenes of counting hundreds and tens, for example: a book has 320 pages per day, there are 920 people per day at a conference, etc. Tell students that numbers in hundreds and tens can be seen everywhere in our daily lives, and they can be useful Big.

Narration: In today’s lesson we will learn the numbers of hundreds and tens together. (Blackboard writing topic: Understanding hundreds and dozens)

2. Operational exploration, learning new knowledge

1. Teaching examples

(1) Intuitive understanding

Show 4 square tiles.

Question: How many small squares are there in these 4 square boards? How many hundreds are there in 400? (Board: 4 hundreds)

(Show 5 wooden strips) inside How many small squares are there? How many tens are there in fifty? (Board: 5 tens)

How many small squares are there in one *** now? How do you know?

(2) Expressed by counter. Have students put beads on the counter and demonstrate by naming them.

(3) Write and read numbers

Let students try to write numbers against the counter, and talk to your classmates about how you write? Why is there 0 in the ones place? 0 Can I not write it? Who can read this number?

2. "Try it" in teaching

Question: Can you count the numbers eleven to ten while moving the beads? , counting from three hundred and ninety to four hundred and thirty?

Please write them down.

(Ask students to show each other to their classmates)

Question: After counting to three hundred and ninety, what to count next? What about counting to six hundred and ninety? What about counting to eight hundred and ninety?

Can you count from 890 to 1,000 without moving beads? (Ask students to count to their classmates)

Question: Count to nine hundred and ninety, what to count next? Follow-up question: Nine hundred and nine What is one thousand after ten?

3. Organize exercises and deepen your understanding

1. Do the first question of "Think, Do, Do".

Read the pictures independently and fill them out, answer by name, and make corrections together.

Question: How do you think that 13 tens is 130?

2. Do the second question of "Think about it, do it".

Fill in independently and correct together.

Question: How are 360 ??and 630 composed?

3. Do questions 3 and 4 of "Think About It".

Named reading, *** is the same as written number. Ask students to write in their notebooks.

Question after revision: What do you think after doing these two questions? Educate students to protect plants and wild animals.

4. Do questions 5 and 6 of “Think about it, do it”.

Let students fill in the numbers or calculations alone.

After completing question 5, ask: Can you tell me what you think? (When doing oral arithmetic, you can use the components of hundreds and tens to think, or you can use the relationship between addition and subtraction to think. . )

5. Do questions 7 and 8 of “Think, Do, Do”.

Do the math orally for your classmates. (Each person is in a group)

6. Do question 9 of “Think about it, do it”.

Independent column calculation. When revising, ask: Why is addition calculated for this question? Summary: Add the number of trees that have been planted and the number of remaining trees, which is the number of trees planted per day.

4. Class Summary

Question: What did you learn in today’s class? What did you gain?

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