How many minutes does it take to cook one egg and three eggs?
Lead to the topic
Second, new funding.
1, one cake takes 6 minutes, how many points does it take to bake two cakes?
Students answer and demonstrate.
2. Study the best section scheme.
Courseware demonstration: twice, the pot is not empty.
3, begin, turn over 4, 6, 8, 10 cake how to save the most time and complete the form.
Summary: 2 brands each time, so that the pot is not empty every time.
4. Q: How should three cakes be branded?
After the group cooperation, the students came to the stage to demonstrate: flip for 3 times, 3 minutes each time, ***9 minutes.
And compare the method of knowing 12 minutes, and discuss why to save 3 minutes.
Student response: Because of the optimization method, the pot is not empty.
5. Discuss the best turning method of 5, 7, 9, 1 1 cake in groups.
Report: 5 is divided into 2 and 3; 7 is divided into 2, 2 and 3; 9 is divided into 2, 2, 2, 3; 1 1 is divided into 2, 2, 2, 2, 3.
6. Summary
Total time = number of cakes ×2÷ the amount that can be baked in each pot × the baking time on each side.
Third, consolidate the practice.
Fourth, summarize and extend.
Verb (abbreviation of verb) course summary