1. Number recognition and operation: including basic operations such as number recognition from 0 to 9, number comparison, number reading and writing, addition, subtraction, multiplication and division.
2. The sequence and arrangement of numbers: understand the sequence and reverse order of numbers, and master the concepts and characteristics of numerical sequences.
3. Understanding and operation of fractions and decimals: Understand the basic concepts of fractions and decimals, and master the addition, subtraction, multiplication and division operations of fractions and decimals.
4. Understanding and properties of geometric figures: including the understanding of geometric figures such as points, lines, surfaces and bodies, as well as their properties and characteristics.
5. Calculation of area and volume: master the calculation method of area and volume of common figures such as rectangle, square and triangle.
6. Data collection and arrangement: Understand the methods of data collection and arrangement, and master the skills of making tables and charts.
7. Logical reasoning and problem solving: cultivate students' logical thinking ability and improve their mathematical thinking ability through problem solving.
8. Time, currency and unit of measurement: Understand the basic concepts and conversion methods of time, currency and unit of measurement.
The above are some key contents of primary school mathematics, and students should pay attention to understanding and mastering these contents in the learning process, so as to lay a solid foundation for subsequent learning.