Burn two first, then burn the third. Grasp the rules in the topic, and bake at most two cakes at a time.

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

The second three minutes marked the opposite sides of the first and second chapters.

Bake for another 3 minutes with the sides of the third cake.

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

Teaching objectives:

1. Through the analysis and research of pancake problem, we have a preliminary understanding of the application of operational research thinking in solving practical problems, and realize 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 habit.

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 awareness, improve ability.

Teaching focus:

Explore the inherent law of pancake problem, realize the optimization idea and find the best solution to the problem.

Teaching difficulties

Learn the best way to bake three pancakes.