1, the factor means that the quotient (b≠0) of the integer A divided by the integer B is exactly an integer with no remainder, so we say that B is a factor of A.

2. Multiplication means that an integer can be divisible by another integer, so this integer is a multiple of another integer.

3. A number has countless multiples, that is to say, the set of multiples of a number is an infinite set. Note: you can't call a number a multiple alone, you can only say who is a multiple of who.

How to learn mathematics well;

Preview, browse the unit content that the teacher will teach before class, and pay attention to what you don't understand. Listen attentively, there are many new definitions of terms or new ideas at the beginning of the new lesson, and the teacher's explanation must be clearer than the students' own reading.

Be sure to listen attentively, don't be smart and make mistakes. If the teacher says something you don't understand during the preview, you should pay special attention. You should remember the key points in class. Definitions, theorems, formulas and other key points should be memorized in class, and the teacher can understand the essence of the teacher by giving examples.

It only takes a short time to review the courses taught after returning home. Practice after class to sort out the key points. In the evening of math class, you must recite the definitions, theorems and formulas taught that day.

Some students think that mathematics pays attention to reasoning and does not need to recite anything. This concept is incorrect. The so-called rote learning refers to the method of rote learning, but the basic definitions, theorems and formulas are our tools to solve problems. If you don't remember these things, you can't solve the problem at all. Practice properly.