"Problem-solving strategy-hypothesis" is the teaching content of the first volume of the sixth grade of Jiangsu Education Publishing House. This section is another problem-solving strategy after students have learned such problem-solving strategies as "thinking from conditions, thinking from problems, listing and drawing line segments".

The courseware calculates the capacity of large bottles and small bottles through examples. By assuming that they are all big bottles or small bottles, according to the quantitative relationship in the topic, change the big bottle into a small bottle or change the small bottle into a big bottle, so as to calculate the capacity of the big bottle and the small bottle.

Design concept:

By comparing two different methods, the courseware understands the essentials of hypothesis strategy; Then distinguish which hypothetical strategies can be used and which can't be used in solving problems, and further refine the strategies; Finally, through two variant exercises, expand the use and mastery of strategies. Finally, make a summary of the whole class, deepen strategic awareness and learn mathematical thinking.