Real numbers are a set of numbers that include all rational and irrational numbers. Rational numbers are numbers that can be expressed as a ratio of two integers, while irrational numbers cannot be expressed as such.

The significance of real numbers in real life is that they form the basis for a wide range of mathematical and scientific applications. For example, they are used to represent quantities such as length, time, and temperature, as well as to describe the behavior of physical systems like waves and particles.

One practical application of real numbers is in financial calculations. Interest rates, stock prices, and exchange rates are all represented by real numbers, which are used to calculate profits, losses, and other financial metrics.

Another practical application of real numbers is in geometry. Real numbers are used to represent the coordinates of points in space, which are essential for calculating distances, angles, and other geometric properties.

Learning about real numbers helps develop several important skills, including:

- Problem-solving: Real numbers are used to solve a wide range of mathematical problems, and learning about them helps develop problem-solving skills.
- Logical reasoning: Real numbers follow a set of rules and properties that are based on logical reasoning, and studying them can help develop this skill.
- Analytical thinking: Understanding the relationships between real numbers and their properties can help develop analytical thinking skills, which are useful in a wide range of contexts.
- Mathematical literacy: Real numbers are a fundamental part of mathematics, and learning about them is essential for developing mathematical literacy, which is useful in many fields.