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What is the content of mathematics in grade three?
Compulsory Education Curriculum Standard Experimental Textbook Mathematics Grade Nine Volume One

Chapter 21 Quadratic Radicals

Chapter 22 One-variable quadratic equation

Chapter 23 Rotation

Chapter 24 Circle

Chapter 25 Preliminary Probability

Compulsory Education Curriculum Standard Experimental Textbook Mathematics Grade 9 Volume 2

Chapter 26 Quadratic Function

Chapter 27 Similarity

Chapter 28 Acute Angle Trigonometric Function

Chapter 29 Forecasts and Views