1, master the oral calculation method of multiplying two digits by one digit, and go through the process of various algorithms to calculate correctly.

2. Understand the meaning of multiplication and solve simple practical problems with multiplication knowledge.

3. Apply multiplication in specific situations and feel the application of mathematics in real life.

Teaching emphasis: master the oral calculation of multiplying two digits by one digit.

Teaching difficulties: two digits multiplied by one digit (carry) oral calculation.

Teaching preparation: teaching wall charts, magnetic boards, pictures and films.

Teaching process:

One: Introduce dialogue.

On Sunday, naughty, laughing and their good friends went to the seaside to play. They bought a lot of things in the shops near the seaside. I would like to ask you to help me figure out how much it costs. Would you like to? (Show wall chart)

(Intention: Stimulate students' interest in learning, narrow the distance between mathematics and life, and lay the foundation for students' active inquiry learning)

Two. Exploration-cooperation-communication

1. Explore the multiplication and oral calculation method of multiplying two digits by one digit without carrying.

(1) Guide the students to observe the pictures. What mathematical information can you find? (Identify each swimming ring 12 yuan and each ball 15 yuan).

(2) Analyze the mathematical information, put forward the questions you are most interested in according to this information, and communicate in groups.

(3) The problem of group feedback can be solved by students with ability. (Ask the question "How much does it cost to buy three swimming rings?" )

(Intention: Through independent inquiry, let students experience the process of finding and solving problems, deepen their understanding of the meaning of multiplication, and lead to the problems to be solved. )

(4) Explore "How much does it cost to buy three swimming rings?" This question, the students use their favorite methods to calculate, and then communicate in groups.

(5) Students report and teachers write on the blackboard. Teachers encourage students with different algorithms in communication. Students should be guided to pay attention to general calculation methods.

Intention: Through this form of student communication with questions and answers, students can learn from each other and promote each other, thus improving their problem-solving ability and mathematical thinking ability. Experience the diversity of algorithms and cultivate the independence and flexibility of students' thinking)

Explore the multiplication and oral calculation method of multiplying two digits by one digit.

(1) Use the found method to independently complete the "try it" for consolidation.

(2) Students explore the method of carry oral calculation, list the formulas independently and try to solve them.

(3) Guide students to talk orally about how to multiply two digits by one digit.

(Intention: further deepen the mastery of knowledge and cultivate students' ability of independent induction and summary)

3. Practical application, expansion and extension

1 Complete questions 1 and 2 in Practice.

Let the students calculate independently first, and then let them talk about different problem-solving methods.

Teachers and students from Ai Xin Primary School will visit us next month. We have prepared some gifts for our friends. Magnetic board shows pictures: notebook 4 yuan, pencil case 2 1 yuan, schoolbag 56 yuan, dictionary 42 yuan, story book 13 yuan. Teacher's Note: Each student can only buy one thing. Think about which gift you want to give. How much to send? How much will it cost? (Group activities)

(Intention: Pay attention to the connection between mathematics and life. Students can choose their own content, let different students learn different mathematics, use mathematical knowledge to solve practical problems, and cultivate students' application ability. )

3. Scenario Simulation (Exercise 3)

There are two kinds of movies on the table. A teacher and a classmate bought a film, and the teacher deliberately caused conflicts. In the process of purchasing, there was a dispute. Who buys film economically and takes more photos? Solve it in the student group. (If students start from different angles in combination with reality, as long as the conclusion is reasonable, they should be fully affirmed.)

(Intention: This activity has improved students' awareness of application, deepened their mastery of knowledge, expanded their thinking and infiltrated moral education. )

4. Evaluation: Students evaluate their own, classmates and teachers' learning of this lesson;

Intention: Through evaluation, teachers can fully understand students' learning process, encourage students to learn and improve teachers' teaching. Through diversified evaluation, they not only pay attention to students' learning level, but also pay attention to students' emotions and attitudes in teaching activities, helping students to know themselves and build up confidence. )