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What is the main content of the third grade math book (Jiangsu Education Edition)?
In ninth grade,

Chapter one. Graphics and proofs (2)

Chapter two. XX degree data

Chapter three. quadratic radical

Chapter four. Binary linear equation

Chapter five. Centrally symmetric figure (2)

Below grade nine

Chapter six. quadratic function

Chapter seven. trigonometric function of acute angle

Chapter 8. Simple application of statistics

Chapter 9. inverse proportion function

Chapter ten. Simple application of probability