I. 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 the decomposition and composition of perceived numbers, master the laws of number increase and decrease and mutual exchange.

3. Develop children's ability to observe, analyze and record, and cultivate children's interest in mathematics.

Second, the focus of the activity

Perceive the relationship between the whole and the part, and learn and record the five points of 6.

Third, the difficulty of the activity

Summarize the law of decomposition and synthesis of numbers within 6.

Fourth, activity preparation

Teaching aid: draw two houses on the blackboard, with 6 or 6 panda cards on each side of the house.

Verb (abbreviation of verb) activity process

Review decomposition and combination 5,

Butt collision

Teacher: I said five,

Child: I'm interested in five,

Teacher: Can 5 be divided by 1 and what?

Child: 5 can be divided into 1 and 4.

.

Teacher: 5 can be divided by 4. What can it be?

Child: 5 can be divided into 4 and 1.

(a), the beginning part

1, import:

Teacher: Autumn is coming. Mother Dashu is busy writing letters, writing here and there, and all the red leaves and yellow leaves are finished.

Many small animals have received letters from Mother Tree. Guess what is written in mother tree's letter? Tell the animals to prepare for the winter.

Teacher: The little animals received the letter from Mother Tree and built many new houses. They are going to spend the winter in the new houses.

Teacher: The panda family has been allocated two houses. There are several pandas in the panda family (including six with children) to display the digital card of "6".

Teacher: How to divide six pandas into two houses? Pandas are worried and don't know how to divide them. How many kinds of distribution are there? Please tell the children.

(2) Basic part

1, please help the little panda divide the house.

(1) Children observe the little pandas and divide the six little pandas into two rooms. Let the children tell their division results, and the teacher will record the results of each division.

2. The teacher summed up the children's points and summed up the five points of "6".

3. Observe the disorderly division of children and guide the orderly decomposition of learning to form "6".

(1), the teacher showed six pandas how to divide the houses, and counted the number of small animals in the two houses with the children and recorded the results. "6" can be divided into 1 and 5,2 and 4,3 and 3,4 and 2,5 and 1.

(2) Children observe the decomposition formula of "6", initially grasp the orderly decomposition and composition of "6", and understand the law of number increase and decrease and mutual exchange.

/

( 1) (5) 1+5=6

(2) (4) 2+4=6

(3) (3) 3+3=6

(4) (2) 4+2=6

(5) ( 1) 5+ 1=6

(3) Let the children read the decomposition formula on the blackboard: for example, 6 can be divided into 2 and 4, 2 and 4 make up 6, and 2 plus 4 equals 6.

(4) Homework, first write a summation formula: 6 6 1+5=6.

/ /

( 1) (5) (5) ( 1) 5+ 1=6; ,9,