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

PPT courseware, learning tool operation data (printing), digital card (printing).

Supporting courseware: "Decomposition and Synthesis of 6" PPT courseware, large class mathematics open class courseware.

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

The teaching plan of "Decomposition and Synthesis of 6" in the open class of mathematics in large classes includes PPT courseware.

(2) Basic part

1, please help the little panda divide the house.

(1) Children observe the red pandas and divide the six red pandas into two rooms. Ask the children to talk about 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 children's disorderly division and guide learning to decompose "6" in an orderly way.

(1) The teacher demonstrated six pandas in separate rooms, and counted the number of small animals in the two rooms 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 composition of "6", and understand the law of number increase, decrease and exchange.

The teaching plan of "Decomposition and Synthesis of 6" in the open class of mathematics in large classes includes PPT courseware.

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

(3) Consolidate exercises (operating learning tools)

Find the key to unlock the lock (unlocking: a key unlocks a lock. Please look at the key and the number on the lock carefully. If the two numbers add up to 6, connect them with a line).

(4) Game activities

1, "Find a friend".

Rules of the game: Please ask the children with cards in front to find the children in the seats to be "good friends". Please add the two numbers to 6.

The train has left.

Rules of the game: Every child has a digital card, and the children whose numbers add up to 6 get on the bus hand in hand and walk out of the activity room while singing the song "The train is leaving".