Burn two first, then burn the third. Grasping the rules in the topic, you can bake up to two cakes at a time.

The first three minutes branded the front of the first and second pictures.

The second three minutes branded the reverse sides of the first and second chapters.

Use the front and back of the third cake for another 3 minutes.

The total time of this scheme is 6×2= 12 minutes.

Teaching objectives:

1, through the analysis and research of pancake problem, I have a preliminary understanding of the application of operational thinking in solving practical problems, and I have realized that it is more complicated to start with simplicity.

Research methods of miscellaneous problems.

2. Feel the extensive application of mathematics in daily life, try to solve simple problems in life, and cultivate "reasonable arrangement and saving time".

Consciousness and habits.

3. By exploring the internal laws in the pancake problem, we can find the internal essential process, so that students can understand the idea of optimization and form the search for the optimal solution.

Case consciousness, improve the ability.