Activity objectives:

1, let children learn to use the composition of numbers and other knowledge to solve oral arithmetic application problems.

2. Cultivate children's analytical and reasoning skills.

Activity preparation:

There are 1 apple tree and 4 apples, and each child has a set of 1~4 digital cards, plus, minus and equal sign cards.

Activity flow:

1. Review the composition of 4 in the form of music game "Find a friend".

Each child takes a digital card of 1~3 and holds it on his chest. While listening to music, they clap their hands and look for the cardholder with number 4 together with their cards.

2. Learn the addition and subtraction of 4. Learn to work out the oral application problems of formulas 3+ 1, 1+3, 2+2, 4- 1, 4-2 and add and subtract these formulas.

(1) The teacher demonstrated the velveteen teaching aid and dictated the addition application problem of "picking apples". Guide children to work out answers with the knowledge of numbers, give reasons, and put forward the addition formula: 3+ 1=4 (pieces), 2+2=4 (pieces). Discuss the meaning of each number and symbol in the formula and know the position of the two numbers on the left and the number on the right of the formula.

(2) The teacher dictated the subtraction problem of "dividing apples". Guide children to calculate the results with existing knowledge and tell their own methods, regardless of the composition and formation of children's calculation results with numbers or other knowledge, teachers should encourage them. Discuss the meaning of each number and symbol one by one.

3. Guide children to do exercises.

The activity started with a game, which aroused the children's interest.

Ask individual children to talk about its operation activities and make a collective evaluation. The teacher will make a simple summary of the child's performance in the operation activities, so that the child can also have a chance to speak.

When doing exercises, guide children to observe the number of objects on the screen and inspire them to list formulas according to different characteristics.

Activity reflection:

In teaching design, we should follow the principles of highlighting the compilation of teaching materials: vividness, interest, process, scientificity, openness and writing, and pay attention to the following problems: grasping the curriculum objectives: teaching is the process of teaching activities and teacher-student communication; Have a sense of development and responsibility, and pay attention to the development of every student; Personalized encouragement language; Try to organize teaching creatively. Strive to embody the following characteristics: advocate democratic and equal teacher-student relationship; Present children's mathematics; Play middle school mathematics; Attach importance to the connection with life.

Insufficient points:

1. All students should be paid attention to in teaching. Don't impose your ideas on students, let them play their role. For example: 2+2=4

2. Courseware making should also pay attention to children and visualization.

3. When doing the "picture book" exercise again, you should prepare an example, or use the projector to lead the child to do a problem, because the child is young and has weak understanding ability.

4. Cultivate children's practical ability in future teaching.