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What knowledge points must be mastered in junior high school mathematics?
Mathematics in grade three is an important foundation in primary school, and students need to master some basic mathematics knowledge and skills. The following are the knowledge points that must be mastered in junior high school mathematics:

1. Identification and comparison of numbers: Students need to be able to identify and write numbers between 0- 100 and be able to compare the sizes of numbers.

2. Addition and subtraction: Students need to master addition and subtraction within two digits, including the concepts and methods of carry and abdication.

3. Multiplication and division operations: Students need to have a preliminary understanding of the concept of multiplication and division, and can perform simple multiplication and division operations.

4. Understanding of quantity and value: Students need to be able to understand and express different quantities of items, and be able to make simple numerical comparisons.

5. Understanding of scores: Students need to have a preliminary understanding of the concept of scores and be able to compare and sort them simply.

6. Use of clocks and calendars: Students need to be able to read clocks and calendars, and be able to perform simple time calculation and date calculation.

7. Understanding of length, weight and capacity: Students need to be able to identify and compare different units of length, weight and capacity and make a simple conversion.

8. Recognition and classification of graphics: Students need to be able to recognize and describe common two-dimensional graphics, and be able to classify and combine simple graphics.

9. Data collection and collation: Students need to be able to collect and collate simple data, including making simple charts and statistics.

10. Problem-solving ability: Students need to develop problem-solving ability, including analyzing problems, proposing solutions and verifying answers.