1, with distinct layers and orderly arrangement. In this lesson, Mr. Zhang let the students demonstrate first, then ask questions and let the students solve problems. Finally, the calculation is step by step, interlocking and clear.

2. Creating situations to stimulate interest introduction In teaching, Mr. Zhang organizes teaching in two steps: 1 is to create specific situations close to students' lives, to narrow the distance between mathematics knowledge and real life, and to enable students to solve practical problems with four operations. Ask four students to act as customers and salespeople respectively, and ask this question: "How much does it cost to buy three calculators and a pen?"

3. Communicate in groups to promote understanding. Look at the data on the price tag and ask the students to talk about the unit price of a stationery. Through the communication between peers, promote each student to feel and understand the significance of calculating the price of shopping. Then ask each student to write an operation to lead to the topic. Through their own calculations, they check each other and know the order of calculation.

4. Concentrate on practice and consolidate the "try it" in the effect book. Let the students fill in independently, check each other's feedback at the same table, read and explain, and say the meaning of each number respectively. "Practice", let students finish independently, and then give feedback. Some challenging problems can appear in the exercise, so that students can cooperate with their peers to solve some problems.

5. Teachers have high personal quality and solid basic skills. Clear thinking, concise and accurate language, timely evaluation, inspiring, smiling and very friendly.