1. Delete refers to deleting one or more specific numbers from a set of numbers so that these numbers no longer exist in the original data. Division refers to the operation of dividing one number by another to get the quotient. In mathematical operations, division is a basic operation to indicate that one number is divided by another.

2. Remove the data used in data processing or statistics to exclude some interference factors or unnecessary data, so as to better analyze and understand the data. Division is a basic mathematical operation, which is used to solve the division problem and calculate the quotient of divisor and dividend.