Activity objectives:
1, learn to master the decomposition and composition of 7.
2. Cultivate children's ability to cooperate with each other.
Activity preparation:
A set of 1 and 1-7 digital cards.
2. Each person has an operation sheet.
3. Brush (self-provided)
Activity flow:
1, review before class
Teacher: Children, you have learned the numbers 0-7. Who can count from small to large?
Teacher: Which child can count it again in the order from the largest to the smallest?
Teacher: The children's answers are great! So, will you compare two numbers randomly from 0 to 7?
The teacher showed the cards and the children answered.
Teacher: How clever the children are! Now the teacher asks the children: Do you still remember the decomposition and composition of Learning 6?
Teacher: What is the decomposition and composition of 6? Who can tell the teacher which kinds? There are five kinds of decomposition and composition. They are: 6 can be divided into 1 and 5, 2 and 4, 3 and 3, 5 and 1, 4 and 2.
Smear coat
Teacher: The children have mastered the decomposition and composition of 6. Today, the teacher led the children to learn the decomposition and composition of magic number 7.
Teacher: The teacher has prepared homework lists for the children. There are some subgraphs on this operation sheet, with 7 points in each row.
Teacher: The teacher painted six dots in the first row red, and the rest were not painted. In fact, the seven points in the first row are divided into two parts, that is, seven points are divided into six 1.
Teacher: How to divide the remaining lines? Please divide the remaining lines into two parts and color them. The teacher asked each line to have a different mark. Color the two marks with your favorite color.
Teacher: Who can tell me your differences? Teachers can encourage other children to express different views from other children.
The teacher put the decomposition and composition of 7 on the blackboard according to the differences the children said:
Teacher: How many kinds of decomposition and composition are there? What if you can't remember so many points? What method can be used to quickly and accurately summarize memories? Guide children to observe the decomposition and composition characteristics of 7 on the blackboard and memorize it in various ways. For example, when they see 1 and 6, they think of 6 and 1 ...)
3. Password
Teacher: Now the teacher is playing password games with the children. The children try to answer first to see who can react quickly.
Teacher: What is the composition of 1 and 7? How much can 7 be divided by 4?
Teacher: How much is five plus two? What number can 7 be divided by 6?
Teacher: How much is seven plus three? What is the sum of 7 divided by 2?
Effective questioning:
1. Who can count from small to large?
What are the decomposition and composition of 2 and 6? Who can tell the teacher which kinds?
3. Which child can talk about your differences?
How many kinds of decomposition and composition are there in 4 and 7? What if you can't remember so many points? What method can be used to quickly and accurately summarize memories?
Useful words: decomposition and synthesis
Activity suggestion:
Activity extension: Teachers can lead children to write the number 7 correctly.