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What should be written in the summary of the second volume of mathematics in grade three?
1, measurement (length unit and mass unit)

2. Addition and subtraction within ten thousand years (2)

3. Quadrilateral

4. Division with remainder

5. Hours, minutes and seconds

6. Multiply multiple numbers by one number

7, a preliminary understanding of the score

8. possibility

9 mathematical wide angle (simple arrangement and combination questions)