Activity objectives:
1. Learn and master the decomposition and combination of 6.
2. In the process of decomposition, we can find the laws of mutual exchange, increase and decrease, and complementarity.
3. I like to use the calculator to do math activities.
An activity preparation calculation demonstration board, a set of calculation boards and several exercise cards for each child.
Activity process
1. Learn about the computing board and stimulate interest.
(1) Know the computing plug-in, and let the children observe and tell its characteristics. The top row has the number 1- 10, and the left row also has the number 1- 10, with a jack on it.
(2) Learn and practice the opening and closing of the calculation board with nursery rhymes.
Open: the left hand and right hand hold the lower ends of both sides of the box together with four fingers, and push the thumb up;
Close: Hold the lower end with your thumb, and pull down the index finger of both hands. (Note: Don't insert your finger into the small hole)
Children practice opening and closing boxes with nursery rhymes.
(3) Practice inserting (collecting) chess pieces
Insert chess pieces: take out a string of red chess pieces and put them in the jack in the lower left corner, and hold them with your left hand. The right hand inserts the pieces one by one, and the left hand blocks the pieces from top to bottom.
Retrieve the chess pieces: You can retrieve them with both hands at the same time, or you can retrieve them one by one with your right hand.
Children practice inserting (receiving) chess pieces in the form of competitions.
2. Learn the decomposition and combination of 6 with a calculator.
(1) Teacher: Little Rabbit takes out six big radishes. She wants to put them in the red basket and the yellow basket respectively. How can she put them together? Ask the children to help it score.
Let the children say division. The teacher uses red chess pieces to represent the radish in the red basket and yellow chess pieces to represent the radish in the yellow basket. Put them on the calculator.
(3) Let the children put some points of six radishes on their own calculation board.
(4) Let the children tell the division of six radishes. According to the division of the children, the teacher puts out the decomposition and combination of six on the calculation demonstration board regularly, and puts out the numbers accordingly.
(5) Ask children to observe the decomposition and combination formula of 6 on the calculation demonstration board, and tell the laws of exchange, complementarity and increase and decrease under the guidance of teachers. (There is one more chess piece in the left row and one less chess piece in the right row; 1 and 5 and 5 and 1, 2 and 4 and 5 and 2, the numbers are the same and the positions are reversed; One more on the left and one less on the right. )
(6) Please arrange the children on their own boards according to the way they are placed on the demonstration board, and talk about the decomposition and combination of 6 with the teacher.
(7) Let children put out the corresponding numbers according to the number of pieces on the chessboard, so that the decomposition and combination diagram of 6 corresponds to the numbers. Teacher and children say the decomposition and combination of six hands and mouth again.
3. Games: Decomposition and Combination 6
Use the exercise card to practice the decomposition and combination of game 6.