1. Learn the subtraction of 4 and continue to perceive the relationship between the three pictures.

2. Further understand the practical meaning of "go" and "go" and express the meaning with correct words.

3. Connect the three pictures independently and express their meaning.

Activity reflection:

Activity preparation:

Three subtraction diagrams of 1. Teaching aid: 4. Video instrument, TV set.

2. Learning tools: P25, pencils and erasers for children's mathematical operations.

Activity flow:

First, group activities.

1. Review the division and combination of 4. 4. Collective, individual and teacher's oral division of labor.

Second, learn the subtraction of 4.

(1) Learn the first set of subtraction in 4.

1. The teacher shows three pictures in turn (the chicken is on the grass). Let the children say the meaning of each picture in the whole sentence. Pay attention to remind children to express the meaning of the picture with the correct words (left). You can get more children to say it.

Please tell the children how many numbers can each picture be represented? List the formulas of the chart.

3. Collective reading formula.

(2) Learn the second group subtraction of 4.

The teacher will directly show three pictures (planes in the sky), let the children use up the whole sentence after observation, and list the formulas to tell collectively and individually.

(3) Learn the third group subtraction of 4.

Show three pictures directly, put a question mark on the last one, and let the children make up their own questions (duckling in the river). The method is as above.

(4) Read the three subtraction formulas of 4 collectively (4- 1=3, 4-2=2, 4-3= 1).

Third, business activities.

1. Look at the picture column subtraction formula.

The teacher tells the exercises first, and then lets the children operate them. Inspire children to observe the changes of pictures carefully, say the meanings of three pictures with words such as "eaten" and "left", and then fill in the formula completely.

2. Complete the split type. (The method is the same as above)

Fourth, comment

Please tell individual children how to operate the collective check (put it on the video instrument).