1. Unit 1: Addition and subtraction of integers
Positive and negative numbers: introduce the concept of positive and negative numbers and explain the law of addition and subtraction of positive and negative numbers.
Number axis and integer: explain the concept of number axis and introduce how to represent integers on number axis.
Unit 2: Addition and subtraction of decimals
Decimal concept: introduce the basic concepts and properties of decimals, as well as the addition and subtraction of decimals.
Decimal operation rules: Summarize decimal addition and subtraction rules, including methods such as bit alignment and zero padding.
Unit 3: Multiplication and Division of Decimals
Multiplication of decimals: This paper introduces the operation steps and rules of decimal multiplication, including the determination of decimal point position.
Division of decimals: explain the basic steps and precautions of fractional division.
4. Unit 4: Understanding of fractions
The concept of score: introduce the definition and basic properties of score, and understand the meaning of score.
Simplification of fractions: explain the methods and skills of fractional simplification.
5. Unit 5: Addition and subtraction of scores
Addition and subtraction of fractions: The addition and subtraction of fractions are introduced in detail, including general fractions and approximate fractions.
Mixed operation: Show mixed operation including fractions, and let students know how to deal with complex fractional operation problems.
Unit 6: Algebraic Expressions
Algebra concept: introduce the basic concepts and expressions of algebra, including the concepts of variables and constants.
Algebraic calculation: introduce the rules and algorithms of addition, subtraction, multiplication and division of algebraic expressions.
Unit 7: Equation
Basic concepts of equation: explain the meaning of equation and the meaning of solution equation, and the expression of equation.
One-dimensional linear equation: The solution and application of one-dimensional linear equation are introduced in detail.
8. Unit 8: Proportion
The concept of proportion: introduce the meaning and nature of proportion, and the expression method of proportion.
Application of proportion: explain the application of proportion in real life, such as similar graphics and proportion.
Each unit in the above mind map can be further refined, including detailed explanations of various concepts, examples and exercises. , to help students better grasp each knowledge point. Such a mind map can help students organize the structure of mathematical knowledge and facilitate review.