1. Find the law, use number pairs to determine the position, divide by integers, get a preliminary understanding of decimals, solve equations, and make a composite broken-line statistical chart.

2. Mathematics and information

3. Rotation and angle

4. Cognitive equation

5. Rotation of graphics

6. Triangle area

7. Double entry statistics

8. Cone volume

9. Invariance of quotient

10. 1 liter? Let the students feel what is 1 liter? There should be a blackboard writing to explain clearly the relationship between "number" and "quantity". )

1 1. Decimal addition and subtraction

12. Countdown seconds

13. Length and cubic volume

14. Area of triangle

15. Multiplicative distribution rate

16. Definition of equation (demonstrated by balance)

17. Average score (10 minutes, let students feel the average score initially. )

18. The importance of multiplication

19. The divider is the division of two digits.

20. Mathematical Wide Angle

2 1. Practical problems, students' understanding of meeting problems, and students' application analysis of the combination of numbers and shapes.

22. Parallel and vertical

23. Invariance of quotient

24. Practical problems of division

25. Decimal divided by integer

26. Multiply two digits by one digit.

27. Multiply two digits by one digit

28. Book 1 of Grade Three, Solve the Problem. There are 23 people living in a hotel with two rooms and three rooms, and there can't be empty beds. How many ways of living are there? (primary school mathematics)

29. Calculation of circle area (primary school mathematics)

30. Addition and subtraction of fractions with different denominators (primary school mathematics)

3 1. quantitative relation

32. Law of Multiplication and Distribution (Elementary Mathematics)