1, one of the five abilities that college entrance examination mathematics must master is the ability of reasoning and argumentation.

2. Reasoning is one of the basic forms of thinking, which consists of two parts: premise and conclusion; Argumentation is a series of reasoning processes from the existing correct premise to the conclusion to be demonstrated.

3. Reasoning includes both deductive reasoning and perceptual reasoning; Argumentation methods are divided into deduction and induction according to form, and direct proof and indirect proof according to thinking method. Generally, reasonable reasoning is used to guess, and then deductive reasoning is used to prove.