1. Understanding Numbers: Understanding the concepts and size comparison of natural numbers, integers, fractions, decimals, etc.
2. Digital operations: four operations of addition, subtraction, multiplication and division, and addition, subtraction, multiplication and division of integers, fractions and decimals.
3. Quantitative relationship: understand the quantitative relationship of equality, greater than and less than, and the use of number axis and number axis line chart.
4. Geometry: Understand the basic geometric concepts such as points, lines, surfaces and angles, as well as the properties and calculations of basic geometries such as squares, rectangles, triangles and circles.
5. Understanding and conversion of measurement units such as time, length, weight and volume.
6. Data statistics: understand the methods of data collection, collation, analysis and representation, as well as the production and interpretation of charts.
The above is the main content of primary school mathematics learning, and the specific learning content and difficulty will gradually deepen and expand with the growth of grade.