"Addition and subtraction of 10" is taught on the basis that students master the composition of 10 and preliminarily understand the meaning of addition and subtraction and the relationship between addition and subtraction formulas through the exercise in Figure 4. "10 addition and subtraction" is an important basis for learning to add and subtract within 20. Therefore, in teaching, teachers attach importance to students' learning process, design the situation that students eat two plates of fish like ducklings, stimulate students' desire to explore, let students observe, analyze, think and calculate themselves, and get all the addition and subtraction formulas of 10.

Teaching content background materials:

Compulsory Education Curriculum Standard Experimental Textbook (PEP Edition) Page 66, Grade One.

Teaching objectives:

1. Through hands-on operation and group cooperative learning, let students experience the fun of learning mathematics in practical activities and stimulate their desire to actively explore new knowledge and learn mathematics well.

2. Correctly calculate the addition and subtraction formula of 10, and deepen the understanding of the relationship between the corresponding addition and subtraction formulas.

3. Gradually cultivate students' mathematical thinking ability, simple practical problem solving ability and cooperative communication ability.

Teaching process:

First, create a situation, review and pave the way

Dialogue: Children, there are many guests in our classroom today. Shall we play a clapping game for the guests with 10?

You shoot 1, I shoot 9, we are all good friends,

You clap 2, I clap 8, unity is strength.

You shoot 3, I shoot 7, we love learning since childhood,

You shoot 4, I shoot 6, talk honestly and don't brag,

You clap 5, I clap 5, and 55 becomes a pair of hands.

Second, self-study and explore new knowledge.

1. Teacher's talk: The guests praised the children in our class for being really capable and gave them a gift. You want to know what it is?

Multimedia demonstration: There are a group of lovely ducklings looking for food on the grass.

Q: What do you see? how much is it?

Health: I think 10 duck.

Q: Do you know what ducks like best?

Health: Fish.

Multimedia demonstration: 10 There are two plates of fish in the duckling picture.

The ducklings are hungry We sent them two plates of fish. Please think about it. What will happen?

Health: They will scramble to eat.

Health: Five ducklings eat one plate of fish and five ducklings eat another plate.

Health: Three ducklings on the left eat a plate of fish, and seven ducklings on the right eat a plate of fish.

Health: 10 Ducks eat one plate of fish, and the other plate of fish is not eaten by ducklings.

Health: (omitted)

2. Students try to operate: children have rich imagination. How will ducklings eat fish? Please use the disc instead of the duckling to score one point and say the formula according to your own score.

3. Two-person group communication: Please tell each other at the same table how you divided it and how you arranged it.

4. Students report that the teacher writes the formula on the blackboard.

Teacher: Who can tell us how you divide it and arrange it?

Health: I divide it like this. Six ducks ate a plate of fish and four ducklings ate another plate of fish. The formula is: 6+4= 10, 4+6= 10, 10-4 = 6, 10-6 = 4.

Multimedia demonstration: Six ducklings on the left eat a plate of fish, and four ducks on the right eat a plate of fish.

Who can tell you how you listed these formulas?

Health: The six ducklings on the left and the four ducklings on the right add up to 10 ducklings; The four ducklings on the right and the six ducklings on the left add up to 10 ducklings; A * * * has 10 ducklings, 6 ducklings on the left eat fish, and 4 ducklings on the right eat fish; There are 10 ducklings, 4 ducklings on the right are eating fish, and 6 ducklings on the left are eating fish.

Health: I think so, because 4 and 6 make up 10, which can be divided into 4 and 6, so 6+4 = 10, 4+6= 10, 10-4 = 6.

Teacher: The children are amazing. They can list four formulas according to a division. What's the difference?

Health: 10 The duckling on the left is eating fish, but no duckling on the right is eating fish. The formula is: 10+0= 10, 0+ 10= 10,10 =10.

Multimedia demonstration: 10 A plate of fish and ducklings on the left is eaten, but a plate of fish and ducklings on the right is not eaten.

Who else is different?

Health: (omitted)

Every time students say a division and formula, they are required to demonstrate how to divide, so as to gradually get all the addition and subtraction formulas of 10.

The guest wants to know which method you use to calculate the addition and subtraction. (Show: 3+7=, 7+3=) Choose a question and work it out in the way you like. Tell your deskmate how you worked it out. (Student Report)

6. tidy up.

Let the children read the formula on the blackboard. What can you find? Tell your deskmate.

Who can tell everyone what you found?

Health: (omitted)

According to the students' answers, the teacher summarizes and leads to the topic. Blackboard writing: addition and subtraction of 10

Third, consolidate and improve our thinking.

1. Practice the addition of 10. Which two cards add up to 10? (Teachers and students do it together and do it at the same table)

2. Practice the subtraction of 10. Take two cards and reduce it by a large number. (Teachers and students do it, and deskmates do it with each other.)

3. See who talks a lot. (Talking to each other at the same table)

()+()=()()-()=()

4. Who can give an example of the addition and subtraction of 10 in life?

Fourth, the class summarizes.

The children did a good job! Is there a problem?

Teaching comments:

The teaching design of this course is the classroom record of the whole school's teaching activities held in Cheng No.1 Primary School in June165438+1October+April, 2003. The main features are: 1. Create familiar life situations for students, introduce topics and stimulate students' interest in learning; 2. In the process of exploring new knowledge, use multimedia teaching, and give full play to students' enthusiasm and initiative through independent observation, hands-on operation, group communication, teachers' timely participation and teacher-student interaction. The classroom atmosphere is lively, and students independently explore all the addition and subtraction formulas of 10, and the effect is good; 3. The practice design has levels and slopes, so that students of different levels can be fully developed, and the practice method fully embodies the new concept of cooperative learning; 4. The summary of the whole class is reviewed and summarized by the students themselves, focusing on cultivating students' ability to express and summarize knowledge in language. What needs to be improved is: making full use of teaching material resources is not in place; Pay attention to group cooperative learning, but it is not enough for students to think independently.