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), the operation of finding another factor A by multiplying the product C and the factor B is division, which is marked as c÷b and pronounced as 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.

The dividend is enlarged (reduced) by n times, and the quotient is correspondingly enlarged (reduced) by n times under the condition that the divisor is unchanged. The divisor is expanded (reduced) by n times, while the dividend is unchanged, and the quotient is correspondingly reduced (expanded) by n times. The nature of division: continuous division by two divisors is equal to division by the product of these two divisors.

Four operations:

Addition: the operation of combining two numbers into one number/two decimals into one decimal/two fractions into one fraction. Subtraction: The operation of finding the other addend by knowing the sum of two addends and one of them.

Multiplication: A simple operation to find the sum of several identical addends. The meaning of decimal multiplication by integer is the same as that of integer multiplication. Multiplying a number by a pure decimal is to find a few tenths and a few percent of this number. The meaning of multiplying a fraction by an integer is the same as that of integer multiplication. Division: the operation of finding another factor by knowing the product of two factors and one of them. It means the same as integer division.