Composition and decomposition of teaching plan 1 activity goal
1, to stimulate children's interest in math activities.
2. Through observation and comparison, let children understand the complementary and interchangeable relationship of numbers and develop their preliminary reasoning ability.
Activities to be prepared
1, 6 watercolor pen.
2, pebbles, paper is not dry.
Activity process
Decomposition components of 1 and review 5.
(1) Explore the interchangeability of numbers.
Teacher: "Who knows how many five can be divided into?" ? Write a composition of 5 on the blackboard. As shown in the figure below:
55 5 5
∧∧ ∧∧
144 1 2332
Teacher: "5 can be divided into 1 and 4, and 5 can be divided into 4 and 1. What are the similarities and differences between these two methods? "
Teacher: "5 can be divided by 2 and 3, and 5 can be divided by 3 and 2." What are the similarities and differences between the two methods? "
(2) Write the composition of each number within 5 by interchange method.
A way for teachers to write the numbers 3, 4 and 5 on the blackboard. Ask the child to write another one.
2. The decomposition of learning 6.
(1) Teacher: "The teacher brought six beautiful watercolor pens today." These six watercolor pens were distributed to two children. How to divide it? ""Please try 6 pebbles each, and then take notes. "
Children operate and explore various methods of 6, and teachers observe and guide them. Remind your child to complete the division, take notes and find out the points of 6.
3. discussion.
(1) Teacher: "How to divide it? How is it recorded? " "How many points have you found?" "How many ways are there?"
(2) games.
Teacher (showing two mysterious bags): "Please ask a child to touch it. How many sweets are there in it? " Then let's take a look together. How many sweets are there in a * * *? Change the number of sweets in one of the bags and let other children touch them.
Activity reflection
According to the spirit of the new syllabus, the design of this activity requires children to "perceive the quantitative relationship of things from life and games", and also pays attention to children's ability to explore, operate, communicate, solve problems and cooperate. This semester, the children in our big class have learned the decomposition and composition of numbers within 2-5, and the children have had some experience in the composition of logarithm. I try to let the children do it by themselves, then record the results, find the law of decomposition and composition under the guidance of the teacher, let the children play middle school, and achieve the combination of activity goals and children's interest optimization.
6 Teaching Plan 2 Composition and Decomposition of Activity Objectives
1, children feel the decomposition of 6 through independent exploration and hands-on operation, and master the five points of 6.
2. On the basis of perceiving the decomposition and synthesis of numbers, master the increasing and decreasing law of digital synthesis.
3. Develop children's ability to observe, analyze and record, and cultivate children's interest in mathematics.
4. Let the children judge the quantity correctly.
5. Understand the relativity of more and less.
Emphasis and difficulty of the activity
1, focus: perceive the relationship between the whole and the part, learn and record the five points of 6.
2. Difficulties: Summarize the law of decomposition and synthesis of numbers within 6.
Activities to be prepared
Teaching AIDS and multimedia courseware
Activity process
First, the beginning part
1, game: battle (review the decomposition and composition of 5)
Teacher: I said 5. Yang: I am about five years old.
Teacher: 5 can be divided into 1 and several children: 5 can be divided into 1 and 4.
（......)
Teacher: 5 can be divided into 4 and several children: 5 can be divided into 4 and 1.
2. Review the division and the types of 2, 3, 4 and 5, and draw out that there are five kinds of division in 6.
In today's activity class, we will learn the decomposition and synthesis of 6. (Show the topic and watch it twice)
Second, the basic part
1, children begin to operate building blocks, explore the five points of 6, and record the results of the exploration on the homework paper.
2, children hands-on operation, teachers patrol guidance.
3. Let the children report the results of the operation. Which child will tell the teacher the division of 6 you found?
Let the children talk, write their records on the blackboard and compare them.
4. Guide children to observe the splitting formula of 6. What did you find? (Hint: What's the change in the numbers on both sides/) The number on the left is more than the number on the right 1, which is called increase, and the number on the right is less than the number on the right 1, which is called decrease. Two sets of figures have been exchanged, but the total has not changed. This is the law of number decomposition and combination.
5. Let the children demonstrate the five points of 6.
6. Split reading 6.
6 can be divided into 1 and 5, 1 and 5, which add up to 6.
Third, the conclusion part.
1, it's time for the little question mark: he wants to check our children's study.
(1) (courseware demonstration) Fill in the missing numbers.
(2) (courseware demonstration) Fill in the shortcomings.
2. Play games: In this activity class today, the children learned the decomposition and combination of 6 and several divisions of 6? Let's play another game together.
Lao: Tell me, kid, how much can 6 be divided by 1?
Yang: Teacher Liu, I'm telling you, 6 can be divided into 1 and 5.
..........
Four. Promotional activities
The children in our class are really great. They learned the decomposition and composition of 6 in such a short time. Now the teacher gives each child a task. If the children have six peaches now, the teacher wants them to share them with your parents. How should they share? Will the children please share it with their parents when they get home?
Activity reflection
According to the spirit of the new syllabus, the design of this activity requires children to "perceive the quantitative relationship of things from life and games", and also pays attention to children's ability to explore, operate, communicate, solve problems and cooperate. This semester, the children in our big class have learned the decomposition and composition of numbers within 2-5, and the children have had some experience in the composition of numbers. I try to let the children do it by themselves, then record the results, find the law of decomposition and composition under the guidance of the teacher, let the children play middle school, and achieve the combination of activity goals and children's interest optimization. The design idea of the activity comes from two poems we recently learned, namely "The Name Card of the Tree" and "Letter from the Mother Tree". The children know that autumn is coming, and Mother Tree is busy writing letters. Mother tree told the little animals to get ready for winter. According to the content of the poem, this activity tries to divide houses for small animals. Children can feel the decomposition of 6 through exploration and independent operation and master the five divisions of 6. Based on the decomposition of numbers, they can learn how to divide.
The activity revolves around allocating houses to small animals. Each child is assigned to six small animals, which are different, including six puppies, six kittens, six rhinos, six elephants and six lions. Every child also has a picture with two houses. Lovely teaching AIDS, coupled with children's happy mood to help small animals divide the house, fully mobilized the enthusiasm of children to operate and explore independently. In the process of assigning houses to small animals for the first time and recording them, the children found five ways to divide "6" through calculation and exploration. When showing children's housing distribution records, some children did not find out five ways to divide "6", and some divided figures did not add up to "6". This is the first time a child has tried recording. I will pay more attention to those who have not mastered it in the next link. Next, guide and observe the disorderly division of children. The teacher will demonstrate that six pandas are divided into houses, count the number of small animals in the two houses with the children, and record the results of the division. "6" can be divided into 1 and 5, 2 and 4, 3 and 3, 4 and 2, 5 and 1, which leads to the orderly decomposition of learning to form "6". Children will observe "6". When children divide small animals into rooms for the second time, they master the orderly decomposition of "6" and record the results of each room division. The activity ended in the cheerful atmosphere of "Find Friends" game, and the children realized the combination of activity goals and children's interest optimization through exploration, operation, communication, playing and learning.
6 Composition and decomposition of lesson plans 3 I. Activity objectives
1. Stimulate children's interest in math activities.
2. Through the observation, comparison and development of children's preliminary reasoning ability, children can understand the complementary and interchangeable relationship of numbers.
3. Know the composition method of 6.
Second, the activity preparation
1.6 watercolor pen.
2. pebbles, the paper is still wet.
Third, the activity process
1. Review the decomposition components of 5.
(1) Explore the interchangeability of numbers.
Teacher: "Who knows how many five can be divided into?" ? Write a composition of 5 on the blackboard. As shown in the figure below:
5555
∧∧∧∧
144 12332
Teacher: "5 can be divided into 1 and 4, and 5 can be divided into 4 and 1. Where are the similarities and differences between these two components? "
Teacher: "5 can be divided by 2 and 3, and 5 can be divided by 3 and 2." Where are the similarities and differences between these two components? "
(2) Write the composition of each number within 5 by interchange method.
A way for teachers to write the numbers 3, 4 and 5 on the blackboard. Ask the child to write another one.
2. The decomposition of learning 6.
(1) Teacher: "Today, the teacher brought six beautiful watercolor pens. Big shot, take the exam. How can you give the six watercolor pens, the teacher and the net, to two children? " "Please try 6 pebbles each, and then take notes."
Children operate and explore various methods of 6, and teachers observe and guide them. Remind your child to complete the division, take notes and find out the points of 6.
3. discussion.
(1) Teacher: "How to divide it? How is it recorded? " "How many points have you found?" "How many ways are there?"
(2) games.
Teacher (showing two mysterious bags): "Please ask a child to touch it. How many sweets are there in it? " Then let's take a look together. How many sweets are there in a * * *? Change the number of sweets in one of the bags and let other children touch them.
Fourth, activity extension.
Put pebbles in the activity room to guide children to operate in daily life.
Five, warm tips
1. Guide the children to write the points of 6 in an interchangeable way.
2. Children should wash pebbles first.
Sixth, reflection activities.
In the teaching content of Decomposition and Composition 6, I pay attention to creating meaningful activity situations and providing children with opportunities for independent exploration and cooperation. Allow children to learn in their own different ways, so that different children can get different development in mathematics learning, which reflects the process of teaching students in accordance with their aptitude. 1. Create a scene to arouse interest in an active atmosphere. In this class, according to the teaching content and the children's personality characteristics, I boldly created and used teaching materials, and introduced the topic with the game scene of "dividing colored beads", which attracted the children's attention, made them in a positive state from the beginning, stimulated their thinking and aroused their interest in learning mathematics. 2, hands-on operation, feel happy in cooperation and communication. Because children have some knowledge and experience of decomposition and combination, I ask them to try, explore, record and communicate the results of their attempts. In this process of exploration and communication, children will be deeply impressed, and at the same time, they will enhance their self-confidence and stimulate their sense of success and pleasure. In short, in teaching, teachers should design lively teaching links, constantly stimulate children's interest and desire in learning, constantly encourage children to experience the joy of success and cultivate their positive emotions.