1. Through review, students can meet the basic requirements in accuracy and speed in the calculation of two-digit times one-digit and remainder division, thus further improving their calculation ability.
2. Train students to think from multiple angles in learning, and let them feel the diversity of problem-solving strategies.
3. In the process of solving practical problems in life, further experience the role and value of mathematics, enhance mathematical consciousness and improve mathematical thinking ability.
Teaching emphasis: solving practical problems in life through addition, subtraction, multiplication and division.
Teaching difficulty: being able to answer practical questions in life with multiple strategies.
Teaching resources: oral cards.
Teaching process:
First, dialogue import:
Talk: Children, we will continue the competition in this class and choose the best group.
Second, consolidate the practice and deepen the improvement:
1, oral calculation:
(1) Show the oral calculation questions with the oral calculation card, and answer them first.
(2) Finish the final review 16. Answer by name and proofread collectively. Find out the cause of the mistake.
2. Written calculation:
(1) calculate the first two verticals of 17.
(2) Talk about the points for attention in calculating multiplication and division.
Third, practical application, expansion and extension:
1, release the star rules:
(1) Conduct independent thinking, discussion and communication within the specified time.
(2) In the first answer, if you can express your meaning correctly, you can get a star, and the team members can supplement it appropriately.
(3) Other groups have different ideas or need to be supplemented. If the meaning is correct, they can also get a star.
2. Complete the question 19:
(1) Show four flower beds with different shapes, introduce the length of each side of the flower bed, and estimate which flower bed has the longest railing around it. Tell me how you estimate it.
(2) Verify whether the estimation is correct and calculate. (Pay attention to new and different ways of thinking throughout, and give sure reward stars in time. )
3. Complete question 20:
(1) Look at the picture carefully. Do you think it's weird?
(2) What are the requirements? Students answer independently. What do you think of the reporting practice?
4. Complete question 2 1:
(1) What information did you get from the table? Ask for what?
(2) Solve the problem according to the conditions provided by the topic.
(3) report the results and ideas.
5. Complete question 22:
(1) Understand the meaning of the question: What do you observe from the picture? What do 45 seats and 30 seats mean respectively?
(2) Think about the car scheme independently, communicate different schemes in groups, and compare the similarities and differences, advantages and disadvantages.
(3) Group report.
6. Judge the best combination.
Third, the class summary:
What did you learn from this course? Carry out ideological education in combination with the learning situation.
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