This topic mainly examines the logical reasoning of mathematical thinking in primary schools. According to A, everyone speaks Chinese in class, so Teacher A teaches Chinese or math. Because the English teacher is the student's brother, because C is a female teacher and younger than the math teacher, the English teacher is a man. So c doesn't teach math. Based on the above, we know: A goes to math, B goes to English and C goes to Chinese.

Mathematical reasoning method:

1, inductive reasoning is from the local to the whole, from the individual to the general reasoning, in induction, we must first according to the individual known parts, appropriate deformation, find out the relationship between them, so as to summarize the general conclusion;

2. Analogical reasoning is the reasoning from special to special, and it is the reasoning between two similar objects. One object has certain properties, and another object has similar properties. In analogy, we should fully consider the reasoning process of known object properties, and then deduce the properties of analogy objects through analogy.

3. Deductive reasoning: Deductive reasoning is the reasoning from general to special, and the mathematical proof process is mainly carried out through deductive reasoning. As long as the major premise, minor premise and reasoning form of deductive reasoning are correct, then its conclusion must be correct, so we must pay attention to the correctness and integrity of the reasoning process.