1. addition and subtraction: this is the most basic operation method, which is used to calculate the sum or difference of two numbers. Through addition and subtraction, students can solve simple math problems.
2. Multiplication and division: multiplication is a shortcut to repeated addition, and division is to find out how many equal parts one number can be divided by another. These two methods are very useful in solving practical problems.
3. Fraction operation: Fraction is an important concept in primary school mathematics, including addition, subtraction, multiplication and division of fractions. Students need to learn how to convert fractions into decimals or vice versa, and master the basic operation rules of fractions.
4. Percent operation: Percent is the form of expressing a number as a percentage, which is often used to express proportion, growth rate, etc. Students need to learn how to convert percentages into decimals or decimals into percentages, and master operations such as addition, subtraction, multiplication and division of percentages.
5. Power operation: Power refers to the result of multiplying a number by several times itself. Students need to learn how to calculate the power and its properties, for example, the addition of radix invariant exponent equals the subtraction of radix invariant exponent.
6. Square root and cube root: Square root means that the square of a number is equal to a given number, and cube root means that the cube of a number is equal to a given number. Students need to learn how to calculate square roots and cubic roots and master their properties.
7. Modular operation: Modular operation refers to finding the remainder of one number divided by another. Students need to learn how to operate modules and master the properties of modules, such as the remainder theorem.
8. permutation and combination: permutation refers to selecting a certain number of elements from a given element for orderly arrangement, and combination refers to selecting a certain number of elements from a given element for disorderly arrangement. Students need to learn how to calculate permutations and combinations and master their properties.