1, integer operation. In primary school mathematics, integer operation is a very basic content. The concepts of integer addition, subtraction, multiplication and division, division with remainder, divisor and multiple are all knowledge points that primary school students must master.
2. Fractional operation. Fraction is one of the difficult knowledge points in primary school mathematics. Pupils need to master the definition, simplification, addition, subtraction, multiplication and division of scores. At the same time, primary school students also need to learn to turn fractions into decimals and decimals into fractions.