What we need to solve is how to divide a three-digit number by a two-digit number. This is a basic mathematical operation, but in order to ensure clarity, we will explain each step in detail. Suppose that the three digits are A and the two digits are B. According to the topic, we need to do: A ÷ B Here, A and B are both integers.

For example, if we choose A= 123 and B=23, then: 123÷23=? In order to carry out the division operation, we can adopt the following steps: divide the single digits of A by B to get the remainder. Multiply the ten digits of A with B, and add the remainder of the first step. Divide the total by b to get the quotient. We can solve the problem of dividing any three digits by two digits in this way. The calculation result is 0, so the result of 123÷23 is 0.

The function and significance of mathematics;

1. Solving practical problems: Mathematics is a tool that can help us solve many practical problems, such as calculating costs, solving geometric problems, making statistical analysis and forecasting.

2. Cultivate thinking ability: Mathematics is an effective way to cultivate thinking ability. By studying mathematics, we can exercise our logical reasoning ability, abstract thinking ability, imagination and creativity, and improve our ability to solve problems.

3. Promote the study of other disciplines: Mathematics is the foundation of many other disciplines, such as physics, chemistry and computer science. Mastering the basic knowledge of mathematics is helpful for us to better understand and apply the knowledge of these subjects.

4. Application in society: Mathematics has a wide range of applications in society, such as finance, economy, engineering, science and medicine. In these fields, mathematics is used to analyze and solve problems, which provides more convenience and guarantee for our lives.