1. Select the appropriate topic and sub-topic.

When drawing a mathematical mind map, it is necessary to first determine the theme and sub-theme in order to better organize the knowledge structure. The theme can be an important mathematical concept or curriculum theme, and the sub-theme can be a specific concept or example related to the theme.

2. Use symbols and charts to represent concepts and relationships.

In order to better express concepts and relationships, symbols and graphics can be used, such as arrows, circles, rectangles, etc. For example, arrows can be used to represent causality or directionality, circles can be used to represent sets, and rectangles can be used to represent theorems or formulas.

Step 3 keep it simple and clear

When drawing a mathematical mind map, keep it simple and clear, and avoid too many words or graphics to avoid confusion. At the same time, we need to pay attention to the matching of font size and color, in order to better express the focus and level.

4. Organize ideas in a logical order.

In order to better express the knowledge structure and logical relationship, it is necessary to organize ideas in logical order to avoid jumping or repeating. At the same time, we need to pay attention to the branches and connections in the mind map in order to better express the relationship between knowledge.

Expand knowledge:

This unit mainly studies Divider is the division of two numbers. The textbook is divided into seven classes, which are introduced in three parts: oral part and estimation part; Pencilist; The changing laws of quotient and user quotient are simply calculated. The emphasis and difficulty mainly focus on the changing law of quotient and its application.

This unit belongs to the category of numbers and algebra. Learning the knowledge and content of this unit well will help to improve students' computing ability and make full preparations for learning more relevant knowledge in the future.

Divider is a two-digit pen division calculation method: divide the dividend from the high order, and try to divide the first two digits of the dividend by the divisor first. If the first two digits are less than the divisor, look at the first three digits. Except for the dividend, the merchants wrote it on that. The remainder after each division operation must be less than the divisor.

Trial-and-error method of two-digit division in which the divisor is not an integer ten: If the divisor is a two-digit number close to the integer ten, the divisor can be regarded as the trial quotient close to its integer ten by rounding, or the divisor can be regarded as the number fifteen close to it, and then the quotient can be directly determined by multiplying one digit.