For example:

1, digital analogy: If 1 apple is equal to 3 yuan, how much are two apples? The answer is 6 yuan. By comparing the relationship between 1 apple and 3 yuan, the relationship between two apples and 6 yuan is deduced, so as to cultivate students' mathematical logical thinking.

2. Graphic analogy: If a square is a quadrilateral, what is a circle? The answer is curved. By comparing the relationship between square and quadrilateral, the relationship between circle and curve is deduced, thus inspiring students to understand the concept of graphics.

3. Physical analogy: If the flying speed of a bird is10m/s, what is the running speed of a cat? The answer is 6 meters per second. Here, by comparing the speed of birds and cats, students can understand the sports ability of different animals.

Concept:

Analogical reasoning is also called "analogy". A form of reasoning. According to the fact that two objects are the same or similar in some attributes, the reasoning process that they are also the same in other attributes is inferred by comparison.

It begins with observing individual phenomena, so it is approximately inductive reasoning. But not from special to general, but from special to special, so it is different from inductive reasoning. There are two forms: complete analogy and incomplete analogy.

The origin and application of analogical reasoning;

Origin:

Analogical reasoning is to classify or classify the same, similar, different and different things from observing individual things or phenomena. This situation can range from general to special, and also from special to general.

If it often happens around us, it turns out that everyone goes to work by bike, and suddenly someone gets on the bus to go to work, this person will be presumed to be rich.

Application:

The logical method of "analogical reasoning" is often used by public security departments in criminal case investigation. If several people are found to be suspects in a criminal case, then "analogical reasoning" is carried out on these suspects.

Those who have been to the crime scene can be ruled out if there is no on-site evidence, and those who commit crimes can be ruled out if they have time to prove that they are not at the crime scene. Finally, through reasoning and inference, who is the suspect is determined and judged, and the suspect is locked through other "evidence chains", which is the logical behavior process of "analogical reasoning".