According to the topic conditions, we know that the sum of these two numbers is 2079, and the unit of a number is 0. We can first consider a number with a bit of 0, such as: 10, 20, 30, ..., 90. The ten digits of these numbers are all 0, so one digit of their sum must be 0.
Then, the unit of another addend is 9 (because the unit of the sum of the two addends is 9). Now, let's consider the ten digits of this addend. If the ten digits of this addend are 1, then this addend is 190 and the other addend is 1 190, and their sum is 2079. So, the answer is that there are countless solutions.
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.