Composition and Decomposition of 7 Teaching Plan 1 Activity Target
Learn the composition and decomposition of 7 and master 6 combinations of 7.
Can calculate the addition and subtraction formula of 7 according to the combination formula.
Understand the law of exchange and complementarity in the composition of 7.
Activities to be prepared
Experience preparation: the child mastered the composition and decomposition within 6 years.
Courseware preparation: "Boys and Girls" scene pictures; Live pictures of "grouping boys and girls"; On-off scene picture.
Material preparation: 1~6 digital card.
Activity process
Show the picture "boys and girls" and guide the children to understand the composition and decomposition of 7.
-How many children are there?
-If these seven children are divided into two parts, how will they be divided? (1 boys 6 girls; 2 red, 5 green; 3 tall, 4 short; 4 long hair, 3 short hair)
Show pictures of the scene of "Boys and Girls Grouping" to help children understand the exchange and complementarity of some numbers.
1, guide children to observe and find the exchange law of partial numbers.
-Split number exchange on the left and right sides, you can get two division methods, but the numbers are the same. This is the exchange law of some numbers.
2. Guide children to observe and discover the complementary relationship of partial numbers.
-From the left, what's the law of numbers changing from top to bottom?
-From the right, what's the change rule of numbers from top to bottom?
Summary: From the left, there is1from top to bottom; From the right, one is less than the other 1 from top to bottom, which is the complementary relationship of partial numbers.
Show the scene picture "on-off formula" to guide children to understand the addition and subtraction formula of 7.
1 indicates the addition of 7, from 1+6=7, and so on to 3+4=7.
-7 can be divided into 1 and 6, 1 and 6. Together, it is 7, which means "addition", so we can deduce the formula: 1+6=7. According to the law that the numbers on both sides of the plus sign are constant, we can deduce 6+ 1 = 7. ...
2. Explain the subtraction of 7 from 7- 1=6, and so on to 7-3=4.
-In the split formula, 7 is the total number, and 1 and 6 are two partial numbers. If one part of the total is removed, it is equal to another part, and the removal is "subtraction", so the subtraction formula can be derived: 7-1= 6,7-6 =1.
Distribute digital cards and organize the game "See who can lift fast" to help children further master the division and combination of 7.
1, the teacher explained the rules of the game.
Look carefully at the sign where the teacher holds the number, and the children will hold another number that can add up to 7. For example, if the teacher mentions 3, you mention 4.
2. Have fun playing games.
7 Teaching Plan 2 Composition and Decomposition of Activity Names:
Synthesis and decomposition of 7 in large-scale mathematics
Activity objectives:
1. Explore the division of 7 in operation and record it.
2, like to participate in math activities, cultivate hands-on operation ability and thinking ability.
Activity preparation:
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Teaching emphases and difficulties
1. Perceive the relationship between the whole and the part, learn and record the six points of 7.
2. Summarize the law of decomposition and synthesis of numbers within 7.
Activity flow:
1, group activities.
(1) Clap game, review and break down 6.
(2) Learn the composition of 7.
① Guide the total number of flowers in children's gardens, divide the flowers into two parts, and encourage children to try various methods. Every time a child says a division, the teacher records it until the child finishes all the divisions.
(2) Let the children count the points * * * and think about how to remember them quickly and well. Children find their own way, teachers discuss with children, and arrange them in an orderly way, so that mistakes and omissions are not easy to occur.
(3) Lead children to find out the arrangement relationship of the numbers before and after, and through observation and perception, find out the changing law of the numbers before and after: the numbers in front gradually become larger and the numbers behind gradually become smaller.
2. Operational activities.
Children's hands-on operation
3. Consolidate the exercises and pat the decomposition of the seventh game.
Activity expansion:
The game "find friends"
Each child chooses a digital card (1-6) to wear, and together with the music of finding friends, find the child with the number "7".
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. The synthesis and decomposition of numbers is an important part of digital concept education. This semester, the children in our big class have learned the decomposition and composition of numbers within 2-6, 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. In this activity, children try to share apples. Through independent exploration and hands-on operation, they perceive the decomposition composition of 7, master the six divisions of 7, and master the law of increase, decrease and exchange of the composition of numbers on the basis of perceiving the decomposition composition of numbers. The activity ended in a cheerful atmosphere of clapping hands in the game. The children realized the combination of activity goals and children's interest optimization through exploration, operation, communication, playing and learning.
Composition and Decomposition of Activity Objectives of "7" Teaching Plan 3
1, children learn the decomposition and synthesis of 7 through cooperative communication, and perceive the order of the sum of numbers.
2. Let children learn and develop together in independent exploration, cooperation and exchange, and fully experience the happiness of group mutual assistance and cooperative learning. Further perceive the relationship between the total number and the partial number.
3. Be able to think positively and improve understanding and calculation ability.
4. Develop visual perception and judgment.
Teaching emphases and difficulties
Teaching emphasis: let children master 6 points and methods.
Teaching difficulties: guide children to find the law of increase and decrease and the law of exchange in the combination.
Activities to be prepared
Courseware, music tape "Where are my friends", glass marbles, magnets, straws, pencils, sheep bones, various graphics, buttons, jelly boxes, various pictures (equivalent to the number of children), and operation materials for children (birthdays).
Activity process
1' s composition, review 6 clap game: Teacher: Hey, hey, how many balls did my 1 ball touch? Child: Hey, your 1 ball touched five balls. Teacher: Let me ask you something, little friend. What is six divided by two? Child: Teacher Zhu, I told you that 6 can be divided into 2 and 4.
2. Study the decomposition of 7.
(1) Let children explore the decomposition of 7 independently. Divide the children into 8 groups, each group has different operating materials, let the children explore the decomposition composition of' 7' independently, and record the combination and expression in front of the group.
(2) Create a situation and show the courseware:
Seven little pigs are playing. Ask the children to look at the pictures to find out the differences between the pigs and write the switch formula. Let the children see the combination, and the teacher guides the children to experience the relationship between composite number and partial number. You know, the total score is always greater than the partial score.
(3) Show pictures of flowers, let children distinguish different flowers, and further learn to master the decomposition of 7.
(4) Show beautiful fish pictures for children to decompose and strengthen decomposition.
3. Show the courseware, and guide children to learn the 7-point formula, understand the relationship between the increase and decrease of the two numbers before and after the 7-point formula, and know that the former number keeps increasing 1, the latter number keeps decreasing 1, and the total number remains unchanged. Read, watch and speak, so that children can further understand the relationship between the total number and the partial number.
4. Play games: clap your hands and ask questions.
Teacher: Let me ask you something. 1 and how many 7s can it be divided into? Child: Teacher Zhu, I told you that 7 can be divided into 1 and 6. Consolidate children's mastery of the separation and combination of 7.
5, play games: "find friends" to strengthen learning and master decomposition 7.
Each child is holding a card in his hand, listening to the music of finding friends and starting to find friends. (There are seven pictures on the cards taken by two children, and they are their friends. )
6, group competition, consolidate the mastery of decomposition and composition 7: Divide the children into three groups, the teacher will show the courseware for the children to answer the competition first, see which group wins and reward them.
7. Complete the exercises on children's operation materials.
8. Evaluate children's participation in activities and completion of homework.
Teaching reflection
Interest is the best teacher for children and the golden key to knowledge. Mathematics knowledge is boring for children. Only when they have a strong interest in mathematics and a strong thirst for knowledge can they enjoy learning. In this class, I started from the children's existing knowledge, combined with the children's life reality and age characteristics, and let the children explore and master the decomposition and composition of 7 independently through games, hands-on operations and group competitions. Let me talk about some experiences in the decomposition and composition of teaching 7:
First, team cooperation, hands-on operation and independent exploration.
In this activity, I prepared a lot of operation materials for the children. At the beginning, I divided the children into 8 groups, each group has different operation materials, so that the children can cooperate in groups, operate by themselves, explore the decomposition of 7 independently, and record their own operation results separately. When exploring the operation, children actively operate their own set of materials, try their best to divide the materials into two parts, and record the operation results. Some group records are repeated, but children are still operating, and some children with strong ability find that the results of repeated records are constantly prompting. Some children don't know where to start. Under my guidance, they can operate by themselves and explore the decomposition of 7. Children's hands-on operation and independent exploration with the cooperation of their peers have improved their hands-on operation ability and active exploration ability.
Second, take the game as the main line to arouse children to explore the mystery of mastering mathematics knowledge.
Games are children's basic activities, and also meet the needs of children's physical and mental health development. Children acquire knowledge and receive education through various games. In this activity, the children have the concept of decomposition and synthesis of numbers within 6. I designed a clapping game at the beginning of the activity. Children are particularly interested in clapping games. When playing games, children can concentrate and answer the teacher's questions accurately. Greatly aroused the interest of children. In the activity, in order to strengthen the children's mastery of the composition of 7, similarly, I used the clapping game again and received the expected effect. Game-Find friends, not only let children count the number of objects on the card, but also let them experience the happiness of having friends. Games are the main line of this activity, that is, let children play games, experience the joy of learning from games, and achieve the purpose of independent exploration and learning.
"Learning while playing" and "learning while playing" enable children to explore knowledge in independent operation, feel the mystery of mathematical knowledge in games, cultivate children's competitive consciousness in competitions, and cultivate children's active inquiry ability by using multimedia teaching methods and pictures, so that children can master the decomposition and composition of 7 in a relaxed, happy and independent range, and can well understand the relationship between the total number and the partial number, which has received good results.
Encyclopedia: decomposition, a mathematical term, is the sum-difference product, and the final result should be decomposed to the point where it can't be divided.