The main contents of primary school mathematics teaching are number and algebra, shape and geometry, statistics and probability, synthesis and practice, which are introduced as follows:

1, number and algebra mainly include: reading and writing methods of numbers (integers, decimals, fractions), rewriting of numbers (turning them into tens of millions or hundreds of millions of numbers, seeking divisors, etc. ), number comparison (integer, decimal, fraction comparison), four operations (calculation rules, operation sequence, operation law, etc. ), and the measurement of quantities (digital calculation)

2. Geometry and graphics include: understanding graphics (the name of graphics, the names of various parts, characteristics, properties, the relationship between graphics, etc. ), observing objects, calculating the area of plane graphics, the surface area and volume of three-dimensional graphics, the movement (translation and rotation), position and direction of graphics, etc.

3. Statistics and probability mainly include: the average mode of statistical tables and charts (bar line, sector, broken line, etc.). ), probability, etc. Teaching situation refers to the concrete image and emotional teaching environment and atmosphere that can enrich students' perception, inspire students to actively explore, guide students to associate and imagine, and stimulate students' interest in learning by various intuitive means.