1. 1 positive and negative numbers

Reading and thinking: using positive numbers and negative numbers to represent the allowable error of machining

1.2 rational number

Addition and subtraction of rational number 1.3

Experiment and Exploration of Filling Rubik's Cube

Reading and Thinking China people first used negative numbers.

Multiplication and division of rational number 1.4

Observe and think about the mathematical truth in the flop game.

1.5 power of rational number

Mathematical activities

summary

Review questions 1

Chapter II Addition and subtraction of algebraic expressions

2. 1 algebraic expression

Read and think about the dialogue between the number 1 and the letter X.

2.2 Addition and subtraction of algebraic expressions

Information technology application spreadsheet and data calculation

Mathematical activities

summary

Review question 2

Chapter III One-variable Linear Equation

3. 1 From Formula to Equation

Reading and Thinking about the Historical Story of Equation

3.2 Solving a linear equation with one variable (1)- merging similar terms and shift terms.

Experiment and Exploration of Infinitely Cycling Decimal Decimal Fractions

3.3 Solve the linear equation of one variable (2)-Remove brackets and denominator.

3.4 Practical problems and linear equations of one variable

Mathematical activities

summary

Review question 3

The fourth chapter is the preliminary understanding of graphics.

4. 1 color graphics

Reading and thinking about the origin of geometry

4.2 Lines, rays and line segments

Measurement of reading and thinking length

4.3 jiao

4.4 This topic is to study the design and manufacture of cuboid packaging carton.