Division is one of the four operations. Given the product of two factors and a non-zero factor, the operation of finding another factor is called division.
Division of two numbers is also called the ratio of two numbers. If ab=c (? B≠0), using the product C and the factor B to find another factor A is division, written as c÷b, and read C divided by B (or B divided by C). Among them, c is called dividend, b is called divisor, and the result of a operation is called quotient.
Long division, commonly known as "long division", is suitable for integer division, decimal division, polynomial division (that is, factorization) and other divisions that pay more attention to the calculation process and quotient, and both multiplication and subtraction are used in the process. According to the multiplication table, two integers can be calculated by long division (direct division).
If the dividend has a decimal part (or decimal point), just bring the decimal point down when calculating; If the divisor has a decimal point, move the decimal points of the divisor and the dividend at the same time until the divisor has no decimal point. An abacus can also do division.
In mathematics, when the first-level operation (addition and subtraction) and the second-level operation (multiplication and division) are in the same formula at the same time, their operation order is multiplication and division first, then addition and subtraction. If there are parentheses, the order of operations at the same level is from left to right. Such operations are called four operations.
The fourth refers to the calculation rules of addition, subtraction, multiplication and division. The expressions of four operations do not necessarily have four operation symbols. Generally, it refers to the operation of combining the majority into a number with two or more operation symbols and brackets.