Let the children explore the decomposition of 5 through specific operations and records. Cultivate children's sense of cooperation, guide children to find the law of addition and subtraction, enhance children's awareness of active exploration, develop children's hands-on and brain skills, and initially cultivate children's logical reasoning ability.

Activity content: "Decomposition and combination of 5" Activity objective:

1, by letting children actually operate, record and explore the decomposition and composition of "5", observe and find out the law of increase and decrease, and perceive the exchange position and invariant relationship of two numbers.

2, cultivate the interest and hobby of active exploration, develop children's observation, thinking and hands-on operation ability, cultivate children's sense of cooperation, activity preparation:

1, 12 record card, 24 small plates, 12 set of "5", a set of large numbers, a big counter, a little frog doll, 60 dried fruits, two wheat fields, a few bugs, and frog badges are equal to the number of children.

2. Demonstration teaching AIDS: two sets of decomposition and combination 5.

3. Everyone has a badge number [5(8), 4(4), 3(4), 2(4), 1(4)].

4, "Find a Friend" tape, some small prizes.

Activity flow:

First, show the puppet frog and review the decomposition and combination of "4" in the form of mobile games.

"Ding, ding Lingling, my phone rang. My phone dial "3" and yours dial "1". Duh ... "Our phone has been dialed. ..

Second, the game: "My little hands are really capable" Let the children work in pairs. One of them put the fruit on two plates separately, and each time it needs to be divided differently, depending on how many kinds can be divided. Another person takes notes on the counting card.

Third, let individual children say the recorded results of four different points of "5", and the teacher will demonstrate and record them, and then let the children say whether the scores obtained by these children are correct or not, and whether they are the same as the scores obtained by them.

5/ \ 1 42 33 24 1

Let the children look at the counting card and find out how many numbers are on the left and on the right. Guide children to observe and find out the rules (increase, decrease, exchange the positions of two numbers and keep them unchanged, etc. For the convenience of memory, please arrange the numbers on the counting card in order: from small to large on the left and from large to small on the right. Please have a look and remember the game: "Little frogs catch pests" needs regular and consolidated decomposition and combination activities: "Find friends" Question: What are we learning today? (5) Please come to the front with the badge "5". The badges of other children together are "5". Hand in hand to "5" to see which group finds friends first and which group wins.