1. Time problem: how to calculate the elapsed time, how to calculate the time difference, how to calculate the time required for the game, etc.

2. Distance: How to calculate the distance between two places, how to calculate the relationship between speed and time, etc.

3. Speed: How to calculate the speed, how to calculate the relative speed, etc.

4. Weight problem: how to calculate the weight of an object, how to calculate gravity, etc.

5. Area problem: how to calculate the area of graphics and how to calculate the area of land.

6. Perimeter problem: How to calculate the perimeter of the figure and how to calculate the length of the fence.

7. Volume problem: How to calculate the volume of an object and the capacity of a container.

8. Probability problem: How to calculate the probability of an event and how to calculate the probability of winning the prize.

9. Statistical problems: how to calculate the average, how to calculate the percentage, and so on.

10, Currency problem: how to calculate the value of currency, how to convert currency, etc.

1 1. Graphic problems: How to judge the shape of a graphic, how to calculate its area and perimeter, etc.

12, Angle problem: how to calculate the size of the angle, how to judge whether the angles are equal or complementary, etc.

Route problem: how to plan the shortest route, how to judge whether there is a straight line between two points, etc.

14. Combination problem: how to calculate the number of combinations and how to solve the problem of permutation and combination.

15, minimax problem: how to find the maximum or minimum value, how to find the maximum or minimum value in a certain range of numbers, etc.

16. Equivalence substitution problem: how to replace unknown quantity with equivalent quantity, how to solve algebraic equation, etc.

17, logical reasoning problem: how to draw conclusions by logical reasoning according to given conditions, etc.

18, divisor and multiple problem: how to judge whether a number is a divisor or multiple of another number, etc.

19. Clock problem: How to calculate the included angle between the hour hand and the minute hand, and how to judge the position relationship between the hour hand and the minute hand on the clock.

20. Tree planting: how to plant a certain number of trees within a certain distance, how to calculate the distance between two adjacent trees, etc.

2 1, solution concentration problem: how to calculate the solution concentration, how to dilute or concentrate the solution, etc.

22. Proportion problem: how to calculate the ratio between two quantities and how to solve the problem of proportional distribution.

23. algebraic equation problem: how to solve algebraic equation, how to find the root of equation, etc.

24. Geometry: How to calculate the area or perimeter of the graph, how to find the center of the graph, etc.

25. Average speed: How to calculate the average speed and how to calculate the total distance at different speeds.

26. Periodicity: How to calculate the quantity in a period and how to judge the periodicity of a phenomenon.

27. Symmetry: How to judge whether a graph is symmetrical, how to find the symmetry axis, etc.

28. Shortest path problem: How to find the shortest path between two points and how to find the shortest path in the grid.

29. permutation and combination: how to calculate the number of permutations or combinations, how to solve the permutation and combination problem, etc.

30. Probability statistics: how to calculate probability distribution, how to test hypotheses, etc.

The importance of primary school mathematics;

1. Mastering the basic knowledge of mathematics: Primary school mathematics is an important stage of basic mathematics education, which is of great significance for students to master the basic knowledge, skills and ideas of mathematics. At this stage, students need to master the concept of numbers, four operations of addition, subtraction, multiplication and division, simple geometric figures and other basic knowledge, so as to lay a foundation for subsequent mathematics study and daily life.

2. Cultivation of logical thinking: Primary school mathematics cultivates students' logical thinking ability and creative thinking by guiding students to solve problems, reason and think. By studying mathematics, students can better understand the nature and laws of things and improve their ability of analysis, synthesis and judgment.

3. Improvement of practical application ability: Primary school mathematics knowledge is closely related to daily life, and learning mathematics helps students improve their practical application ability. For example, when shopping, you need to use mathematical knowledge to calculate the price, measure the length and calculate the speed. By solving practical problems, students can better understand the practical application value of mathematical knowledge and improve their practical ability and innovative consciousness.