Teaching objectives of 1
1, learn to look at the scene diagram and list the addition and subtraction formulas within 7 and operate.
2. Try to write simple application questions.
Teaching preparation
1. Scene: 4 chickens, 6 apples, 6 birds and 7 balloons.
2, interesting math, pen.
teaching process
1, review the decomposition components within 7.
The teacher plays "touch the ball" with the children. (collective touch, personal touch, group touch)
2. Learn to look at the formula of scene diagram and compile application questions.
(1) See Figure 1. Question: Today, Miss Li brought some pictures to the children.
Look at the first couple: there are two chickens on the grass, and two more come. How many chickens are there in a box? Please answer that there are four children first, and then ask the teacher how to list the formula 2+2=4.
(2) Look at Figure 2 and ask: There are six apples on the tree, and two apples have fallen. How many apples are left? Let the children answer the numbers first, and then ask how to list the formulas. Teachers' records. (6—2=4)
(3) Look at the picture and ask: Look at this picture. Who will look at this picture and make it into a problem?
Guide the children to tell where there are birds and how many birds there are. How many birds have flown? Finally, how many birds are there in a box?
(4) Look at this. Who would make up a question? How many balloons does the child have, how many are broken, and how many are left?
3. Children practice addition and subtraction within 7.
Offering interesting mathematics P2 1~22, encouraging children to list formulas while looking at pictures and compiling questions.
Large class mathematics 7 addition and subtraction teaching plan 2 activity goal
1, learn to add and subtract 7, and add and subtract numbers within 7.
2. Further consolidate the understanding of addition and subtraction formulas and their meanings.
3. I love to use my brain and can actively participate in addition and subtraction activities.
4. Experience the life of mathematics and the fun of mathematics games.
5. Cultivate children's interest in calculation and the accuracy and agility of thinking through various sensory training.
Activity preparation 1, fun exercise: add and subtract formula 2, teaching aid picture Give the child a book and the child has a pen.
Activity process
First, the introduction of project teachers:
The monkeys came back from their trip. Let's go and see them.
1. Show me the picture: Where is the little monkey? What are they doing?
Let the children talk about the position of each little monkey and what they are doing.
For example: 1 little monkey, 6 big monkeys.
Guide the children to list the addition or subtraction formulas and say the meaning of each number.
For example, 1+6=7, that is, 1 a little monkey and six big monkeys add up to seven monkeys.
Another example: 7- 1=6 means that among the seven monkeys, there is a little monkey, and the rest are big monkeys.
3. Continue to arouse children's thinking: Can you list different formulas?
Second, children's operation activities.
1. Look at the picture and mark the formula according to the characteristics. How many objects are there in the picture?
What are their colors and other characteristics?
Then, list the first group of addition and subtraction formulas of 7.
2. Observe three consecutive pictures, tell the meaning of the pictures, and list the addition and subtraction formulas.
3. Lead the children to open the children's book 12 and 13 respectively, and guide the children to practice the second and third groups of addition and subtraction operations in 7.
(You can also practice in groups. This activity only completes one page of exercises, and other exercises are carried out in daily life or in the region. )
Three. Activity evaluation
Ask children to introduce the activity of "looking at characteristic formulas", encourage children to say the meaning of each formula, and help children understand the meaning of addition and subtraction.
Activity reflection:
Use standardized language to deepen their understanding of mathematical knowledge and make them understand the meaning of related concepts. Only by fully understanding mathematical theory, scientific and comprehensive understanding of mathematical concepts and children's thinking characteristics and learning rules can mathematical concepts be correctly applied to teaching activities. Only in this way can children be effectively guided to learn, understand and use mathematics in their lives.
Addition and subtraction teaching plan 3 large class mathematics activity goal 7
1, try to use the composition of 7 for reasoning and parallel calculation, and learn the addition and subtraction of 7.
2. Explore and discover the law of exchange and complementarity, and add and subtract flexibly.
3. Be able to take the initiative to participate and develop the thinking quality of seeking difference and innovation.
4. Guide children to actively interact with materials and experience the fun of mathematics activities.
5. Experience the happiness of math activities.
Activities to be prepared
1 and 7' s composition, addition and subtraction formula, picture or courseware (content: 7 birds: 1 in front, 6 in the back; 2 black, 5 yellow; Three in the tree and four in the sky).
2, the composition of 7, the numbers and symbols needed in the addition and subtraction formula, a set of children's hands.
Activity suggestion
1, organize children to play clapping and filling in numbers, and review the composition of 7.
(1) Clap your hands. Children clap their hands and say the combination of 7. For example, 7 can be divided into 1 and 6, and 1 and 6 add up to 7.
(2) fill in the number game. Let the children fill in the appropriate numbers of the components of 7 quickly and correctly.
2. Guide children to observe pictures, find the relationship between numbers, and learn the addition and subtraction of 7.
(1) Guide children to describe the parallel formula in the order of birds flying in succession, adding first and then subtracting.
For example, 1 A bird flies in a tree, and then six birds fly in. How many birds are there in the tree? how do you know Please list the formula 1+6=7 and tell the meaning of each number and symbol.
Teacher's question: If six birds fly in first, and then 1 bird, how to make the formula? Children can list: 6+ 1=7. Guide the children to find that the total number remains the same after the numbers on both sides of the plus sign are exchanged.
Use the composition of 7 to guide children's reasoning and list the first group of subtraction formulas of 7. For example, since 7 can be divided into 1 and 6, the sum of 1 and 6 is 7,7-1= 6,7-6 =1.
(2) Inspire children to list the other seven addition and subtraction formulas according to the on-off formulas used in the case of black and yellow birds (different colors) or trees and sky (different positions) in the picture. Listing 3+4=7, 4+3=7, 7-3 = 4 and 7-4 = 3.
Please tell the children what the numbers and symbols in the formula mean.
3. According to the addition and subtraction formula of 7, encourage children to write new application problems according to their own interests and experiences.
For example, according to 7-2 = 5, it can be compiled that there are 7 balls in our class and 2 balls are lent to small classes. How many balls are left in our class?
Guide children to create application problems with novel themes and develop their thinking quality of seeking difference and innovation.
4. Use the form of quick question and answer to help children practice the addition and subtraction of 7 repeatedly to improve their quick and accurate response ability.
For example, the teacher said 3+4, and the children quickly answered 3+4=7. It can also be in the form of children asking questions and teachers or all children answering them.
Big class math 7 addition and subtraction teaching plan 4 activity goal:
1, according to different pictures, list the corresponding formulas, so as to perceive the quantitative relationship expressed by the addition and subtraction formulas.
2, understand the exchange law, know how to use the exchange law to list another formula.
3. Actively explore mathematical activities and be willing to talk about the exploration process.
Activity preparation:
1, teaching AIDS: four castle drawings, four paintings, the number 1-7, symbols+,-,=.
2. Four paintings, four pens and firecrackers, and several homemade gold medals and silver medals.
Activity flow:
1, review and consolidate: driving a train
We used to play the game of driving the train with numbers 5 and 6. Today, the teacher takes everyone to play the No.7 train game.
Hey hey! My train leaves at one o'clock. What time does your train leave?
Hey hey! My train leaves at 6 o'clock. (collective, individual)
2, situational awareness-the first group of addition and subtraction in graphics.
You see, the train took us to the castle kingdom. A * * * has four castles, including green, red, yellow and blue castles. Do you want to visit such a beautiful castle? (Phone rings) It's from the king of the castle kingdom, saying that there are three paintings in these four castles. Please tell the things in the picture in three sentences. If anyone can say this sentence correctly, it is. Do you want to talk about it? Ok, let's start the discussion.
1) children's first exploration operation-telling with pictures
(1) Q: Please tell me, what color castle did you choose? What does it say? There is a bird in the tree. Six birds fly in. There are seven birds in the tree. ) Collective verification and collective storytelling.
(2) Ask children from castles of other colors to tell stories (after being verified by everyone, tell stories collectively).
Conclusion: Ah, our children are really capable. We can make things clear in four castles at once. The king also praised us as the cleverest little guests. Praise yourself quickly.
2) Children's second exploration operation-listing formulas while talking.
(Phone rings again) The king of Castle State called xu teacher again and said that he would still test our children. Just now, he asked the children to talk about things in four castles. Now, let the children record it with a formula problem according to what they just said.
1) Explain the operation requirements of children.
Key question: How did you record this? Why use the addition formula? Ask a child to come up and remember this addition formula as he speaks. (1+6=7) Read the formula twice together. By analogy, three other formulas are obtained respectively. 6+ 1=7、7- 1=6、7-6= 1。 Read the formula again.
3. Experience understanding-exchange rule
1) Let children observe these formulas. Do they have any little secrets? See who can discover the secret first.
Summary: 1+6=7, 6+ 1=7 have the same number but different positions. But the total number remains the same, so when I see 1+6=7, I immediately think of 6+1=7. We call it the question of friends. See also 7- 1 = 6, and immediately think of 7-6 = 1. We also call it the friend problem.
2) Practice communication. The teacher took out the problem card and asked our child to tell us immediately who his friend's problem was. 1+6=7(6+ 1=7)、7- 1=6(7-6= 1)
4. Internalized migration-children's games
Rules of the game:
(1) There is still a recipe problem hidden in each firecracker. If anyone can make the recipe right, firecrackers will ring and a small red flower will be obtained. Similarly, if the formula is wrong, firecrackers will not ring.
(2) Please choose one child from each team to participate in the competition at a time. If you see the last team get the most little red flowers, you will win the gold medal.
Summary: Award the gold medal winners and silver medal winners in the competition.
End of the activity: take the children into the castle to dance.
Activity expansion:
1, continue to explore the addition and subtraction of the second group and the third group 7.
2. Use regional activities to further consolidate the drawing formula.
Addition and subtraction teaching plan 5 large class mathematics activity goal 7
1, learn the addition and subtraction of 7, list the addition and subtraction formulas according to the different colors of flowers, and add and subtract numbers within 7.
2. Further consolidate the understanding of addition and subtraction formulas and their meanings.
3. I love to use my brain and can actively participate in addition and subtraction activities.
Activities to be prepared
Experience preparation: the child has the experience of watching the composition of the picture column, and learned to add and subtract numbers within 6 and the composition of 7.
Material preparation:
-Teaching aid: a picture (with 7 monkeys, including 1 little monkey and 6 big monkeys); Two monkeys are in the tree and five monkeys are on the grass. Three monkeys are eating bananas and four are eating apples. )
-Learning tools: children's books (P 1 1, 12, 13), and children have pens.
Activity process
First, go to see the monkeys.
Teacher: Do you remember the story of seven little monkeys traveling? The monkeys came back from their trip. Let's go and see them.
1. Teacher (showing pictures): Where is the little monkey? What are they doing?
Let the children talk about the position of each little monkey and what they are doing. Such as: 1 little monkey, 6 big monkeys …
2. Teacher: Can it be expressed in a formula?
Guide the children to list the addition or subtraction formulas and say the meaning of each number. For example, 1+6=7, that is, 1 a little monkey and six big monkeys add up to seven monkeys. Another example: 7- 1 = 6 means that among the seven monkeys, there is a little monkey, and the rest are big monkeys.
3. Continue to arouse children's thinking: Can you list different formulas?
Second, children's operation activities.
1. Look at the picture and mark the formula according to the characteristics. How many objects are there in the picture? What are their colors and other characteristics? Then, list the first group of addition and subtraction formulas of 7.
2. Observe three consecutive pictures, tell the meaning of the pictures, and list the addition and subtraction formulas.
3. Lead the children to open the children's book 12 and 13 respectively, and guide the children to practice the second and third groups of addition and subtraction operations in 7. (You can also practice in groups. This activity only completes one page of exercises, and other exercises are carried out in daily life or in the region. )
Third, activity evaluation.
Ask children to introduce the activity of "looking at characteristic formulas", encourage children to say the meaning of each formula, and help children understand the meaning of addition and subtraction.
Big class math 7 addition and subtraction teaching plan 6 activity goal:
1, according to different pictures, list the corresponding formulas, so as to perceive the quantitative relationship expressed by the addition and subtraction formulas.
2, understand the exchange law, know how to use the exchange law to list another formula.
3. Actively explore mathematical activities and be willing to talk about the exploration process.
4. Cultivate children's ability to recognize numbers.
5. Interested in participating in math activities.
Activity preparation:
Four castle drawings, four paintings, number 1-7, symbol+,-,=, envelope activity flow:
1, review and consolidate: play "touch the ball" Teacher: How many balls did my 1 ball touch?
Yang: Your 1 ball touches 6 balls.
2, situational awareness-the first group of addition and subtraction in picture learning 7,
You see, the train took us to the castle kingdom. A * * * has four castles, including green, red, yellow and blue castles. Do you want to visit such a beautiful castle? (Phone rings) It's from the king of the castle kingdom, saying that there are three paintings in these four castles. Please tell the things in the picture in three sentences. If anyone can say this sentence correctly, it is. Do you want to talk about it? Ok, let's start the discussion.
1) children's first exploration operation-telling with pictures
(1) Q: Please tell me, what color castle did you choose? What does it say? There is a bird in the tree. Six birds fly in. There are seven birds in the tree. ) Collective verification and collective storytelling.
(2) Ask children from castles of other colors to tell stories (after being verified by everyone, tell stories collectively).
Conclusion: Ah, our children are really capable. We can make things clear in four castles at once. The king also praised us as the cleverest little guests. Praise yourself quickly.
2) The child explores the operation for the second time-listing the formula while talking (the phone rings again). The king of Castle Country called again. It also wants to test our children. Just now, we asked the children to talk about things in four castles. Now let the children record it with a formula problem according to what they just said.
1) Explain the child's operation requirements 2) Key question: How did you record this? Why use the addition formula? Ask a child to come up and remember this addition formula as he speaks. (1+6=7) Read the formula twice together. By analogy, three other formulas are obtained respectively. 6+ 1=7、7— 1=6、7—6= 1。 Read the formula again.
3. Experience understanding-exchange rule
1) Let children observe these formulas. Do they have any little secrets? See who can discover the secret first.
Summary: 1+6=7, 6+ 1=7 have the same number but different positions. But the total number remains the same, so when I see 1+6=7, I immediately think of 6+ 1 = 7. We call it the question of friends. See also 7- 1 = 6, and immediately think of 7-6 = 1. We also call it the friend problem.
2) Practice communication. The teacher took out the problem card and asked our child to tell us who his friend's problem was at once. 1+6=7(6+ 1=7)、7— 1=6(7—6= 1)
4, internalized migration-children's game rules:
(1) There is also a formula problem hidden in each envelope. If you answer it correctly, you will get a small red flower.
(2) Please choose one child from each team to participate in the competition at a time. If you see the last team get the most little red flowers, you will win the gold medal.
Four: Children practice the theme of mathematical operation.
Activity reflection:
This activity aroused children's interest in participating in the activity by creating a story situation of "saving lazy sheep with wisdom" in the cartoon Pleasant Goat and Big Big Wolf, which children are familiar with. At the same time, the progressive problem is designed, with vivid courseware, so that children can learn the addition of 7 happily in the game and find the law of using exchange.
First of all, according to the children's cognitive level, the actual situation and the characteristics of the textbook itself, I mainly divided the activities into four blocks for organization. Introduction to the game of "touching the ball"-adding perceptual learning in the situation 7-communication verification-grouping operation and internalization transfer. In the introduction, I think, "If you play ball games with time flies, you can take your children to mysterious places." Stimulate children's interest in participating in activities and review the composition of 7. Next, the second part is the key and difficult part of the activity. Children should understand the meaning of addition, learn to look at pictures and formulas, and understand that the positions of the two addends remain unchanged before and after the plus sign exchange. In this link, I guide my children to observe the formula through three levels, and let them gain more direct knowledge accumulation through hands-on operation, table recording and other forms. Letting children observe with tasks not only cultivates their interest in observation, satisfies their desire to express, but also enhances their understanding of the meaning of "addition". Then guide the children to express the exchange rules they found from the three groups of formulas, exchange with their peers and teachers, and take the affirmative words as the verification result of the password game entering the gate of Wolfsburg. Finally, the key knowledge of this activity will be consolidated, deepened and internalized in the group work of "Wolf Castle Saving Sheep". Children can actively participate in the whole activity, have a high interest, and their ideas have always followed the teacher. All the children can correctly list the addition formula of 7. After this activity, I found:
Advantages:
1, the situation created has greatly attracted children's interest in participating in activities, and children's routines have made obvious progress.
2. The level of each link in the activity is clear and can be progressive.
3. Make clear the requirements in time before letting the children operate, and let the children operate as required.
Children can achieve the expected effect in this activity.
Insufficient:
1. In the activity, because children are too eager to express and use the exchange rules, the problem of guiding children to discover the rules is not raised enough. Teachers should summarize first before children can express them.
2. In the third communication verification session, the teacher's guide language can be clearer, combined with wall charts and gestures.
3. The pictures of some pages in the courseware are more complicated, such as the flowers and trees are not prominent enough.
Through this activity, I have the following insights on organizing math activities in the future: first, teachers must observe children's life needs, enter children's lives, understand and understand children, see the world with children's eyes, and guide children to understand mathematics in life; Secondly, teachers should have comprehensive and scientific new values of mathematics education, make children's daily life mathematical and explore the active situational mathematics activity mode for children, which is an effective way to implement the spirit of the outline. Moreover, teachers must learn mathematical theory and understand mathematical concepts. Use standardized language to deepen their understanding of mathematical knowledge and make them understand the meaning of related concepts. Only by fully understanding mathematical theory, scientific and comprehensive understanding of mathematical concepts and children's thinking characteristics and learning rules can mathematical concepts be correctly applied to teaching activities. Only in this way can children be effectively guided to learn, understand and use mathematics in their lives.
Addition and subtraction teaching plan 7 large class mathematics activity goal 7
1, perceive the quantitative relationship of things, add and subtract application problems according to objects and pictures, and learn to add and subtract 7.
2. Learn to say the meaning of the formula in clear language.
Activities to be prepared
1, 2 background pictures, 7 rabbits and 7 kittens as magnetic teaching AIDS, 2 groups of numbers 1-7, and arithmetic symbols "+","-"and "=".
2. Children's operation materials: one piece of paper and one piece of pen.
Activity process
Review the composition and addition and subtraction within 7 first.
1, Game: What time does my train leave?
Rule: The teacher shows different arithmetic problems (such as 3+2=? Q: When does my train leave? The child replied: 3+2=5, your train leaves at 5 o'clock. This game is repeated several times.
2. Show the number 7 and review the composition of 7.
Ask individual children to write 7 compositions from small to large or from large to novel.
Second, oral application questions, learn the addition and subtraction of 7.
1. Show the diagram 1 to guide children to observe:
This picture shows five rabbits playing on the grass. At this time, the teacher put two rabbits on the picture. Please describe the picture in three sentences according to the picture and the teacher's operation just now.
-Ask children to express their ideas with addition arithmetic (5+2=7).
-Children read formula questions and encourage them to say the meaning of each number and symbol in the formula.
2. Show Figure 2 to guide children to observe:
The picture shows seven kittens playing in the amusement park. At this time, the teacher took three kittens from them. Please look at the picture and tell the meaning of the picture in a coherent language according to the teacher's previous operation, and list the formula (7-3=4).
Let the children say the meaning of each number and symbol in the formula.
Third, children's operation activities.
1, paper, pen, one hand, children list 7 addition and subtraction problems according to their meaning.
2. Check the children's homework and comment together.
Teaching plan of addition and subtraction in large class mathematics 7 8 1. Activity objectives:
1, guide children to learn the first group of addition and subtraction of 7 while enjoying animation.
2, with the help of animation demonstration, guide children to initially perceive the reciprocal law of addition and subtraction.
3. Cultivate children's hands-on operation ability and reverse thinking ability.
4. Improve the ability of logical reasoning and form a good habit of doing things in an orderly way.
5. Cultivate children's interest in calculation and the accuracy and agility of thinking through various sensory training.
Second, the activity preparation:
Teaching courseware "Learning 7, the first group of addition and subtraction"
Every child has a set of numbers. Three. Activity flow:
Beginning part:
Question and answer game: review the composition and decomposition of 7. Click on the courseware, and Mother Cat appears: "Look, children, who's here?" Mother cat wants to play a question and answer game with the children!
After opening the courseware, Mother Cat asked: Let me ask you, children, what is 1 and divisible by 7?
Children answer: 7 can be divided into 1 and 6. Review the composition and decomposition of 7 in turn. Mother cat praised the children "Great!" Mobilize children's learning enthusiasm.
Basic part:
(1) Enjoy Cat Fishing and learn the first group of addition and subtraction of 7.
1, demo courseware, children enjoy the animation and answer questions.
(1) Here comes the kitten. Let's have a look. How many kittens are there? How did you work it out? How to express it? Learning 1+6=7 6+ 1=7.
(2) Mother cat took her kitten to the river to fish, watched the kitten fish and eat fish, and learned 7- 1=67-6= 1.
2. Animation demonstration of the law of addition and subtraction reciprocity Animation demonstration of the movement and change of numbers and addition and subtraction symbols to guide children to discover the law.
(2) Appreciate the self-compiled application questions of "Cats Catch Butterflies" and "Cats Chase Birds".
1, the courseware demonstrates how many butterflies have come, how many have flown away and how many are left?
Operation exercise: 6+1= 71+6 = 7 7-1= 6 7-6 =12. The courseware demonstrates the kitten chasing birds: How many birds are there in the forest, and how many have flown away?
Children's self-made application problems, operation exercises: 6+1= 71+6 = 77-1= 67-6 =1.
(3) Write application questions according to the objects. (The application of masons in calculation activities) (4) Writing application questions through calculation formulas.
Activity reflection
I remember that when teaching mathematics in grade one, the decomposition, combination, addition and subtraction of 7 are the teaching contents, and the focus is on learning. However, since the textbook was adapted from kindergarten, decomposition, addition and subtraction within 10 have become the teaching contents of large classes. The addition and subtraction within 5 last semester is easy for children to learn, but the addition and subtraction of 6 and 7 next semester is a bit difficult. If it is a simple calculation formula, we will habitually use our little finger to calculate. Personally, I think this is a bad habit, which is not conducive to the discovery of children's thinking and the enthusiasm of the brain. The calculation of preschool children should be done with the help of some school tools, articles and legends. On the basis of proficiency, learn to calculate slowly. How sad it is that several children are so dependent on bad habits that they turn a blind eye to school tools and pictures! The emergence of this phenomenon, on the one hand, is due to the wrong guidance of parents to their children to get up early. Parents always let their children learn arithmetic too early, and the learning methods and skills are extremely unscientific, even typical mistakes. Then, as teachers, do we really understand the requirements of the Guide for Learning and Development of Children Aged 3-6 for children's development goals, and are there any factors that exceed the standard? Poor children should immediately change their previous bad habits.
Based on the above considerations, we plan to hold a parent-teacher conference in the near future to reasonably guide parents to form early education concepts and methods suitable for young children, and then strengthen the study and discussion of the Guide to make our teaching more efficient and accurate!
Large class math 7 addition and subtraction teaching plan 9 activity goal:
1, learn the addition and subtraction of 7, list the addition and subtraction formulas according to the different colors of flowers, and add and subtract numbers within 7.
2. Further consolidate the understanding of addition and subtraction formulas and their meanings.
3. I love to use my brain and can actively participate in addition and subtraction activities.
Activity preparation:
1, experience preparation: the child has the experience of watching picture composition, and learned to add and subtract numbers within 6 and composition of 7.
2. Material preparation:
-Teaching aid: a picture (with 7 monkeys, including 1 little monkey and 6 big monkeys); Two monkeys are in the tree and five monkeys are on the grass. Three monkeys are eating bananas and four are eating apples. )
-Learning tools: children's books (p 1 1, 12, 13), and children have pens.
Activity flow:
1, to see the monkey.
Teacher: Do you remember the story of seven little monkeys going on a trip? The monkeys came back from their trip. Let's go and see them.
Teacher (showing pictures): Where is the little monkey? What are they doing?
Let the children talk about the position of each little monkey and what they are doing. Such as: 1 little monkey, 6 big monkeys. ...
Teacher: Can it be expressed in a formula?
-Guide children to list addition or subtraction formulas and tell the meaning of each number. For example: 1+6=7
It means 1 A little monkey and six big monkeys add up to seven monkeys. Another example: 7- 1 = 6 means that among the seven monkeys, there is a little monkey, and the rest are big monkeys.
-Continue to arouse children's thinking: Can you list a different formula?
2. Children's operation activities.
-Look at the picture and mark the formula according to the characteristics. How many objects are there in the picture? What are their colors and other characteristics? Then, list the first group of addition and subtraction formulas of 7.
-Observe three pictures in succession, tell the meaning of the pictures and list the addition and subtraction formulas.
-Lead children to open pages 12 and 13 of children's books respectively, and guide children to practice the second and third groups of addition and subtraction in 7. (You can also practice in groups. This activity only completes one page of exercises, and other exercises are carried out in daily life or in the region. )
3. Activity evaluation.
Ask children to introduce the activity of "looking at characteristic formulas", encourage children to say the meaning of each formula, and help children understand the meaning of addition and subtraction.