1, radix: radix refers to the actual quantity that a number can represent. For example, the number 1 can represent one object, the number 2 can represent two objects, and so on.
2. Ordinal number: Ordinal number refers to the position of a number in a series. For example, the number 1 is the first number in the sequence, the number 2 is the second number in the sequence, and so on.
3. Read and write numbers: Reading and writing numbers is the basic application of numbers. We need to learn to read and write the number 1-5 correctly. For example, 1 is pronounced as "one", 2 as "two", and so on.
4. Number sequence: The number sequence refers to the arrangement of numbers on the number axis. For each number of 1-5, we need to know their order on the number axis, that is, 1 is on the far left, 2 is on the right of 1, 3 is on the right of 2, 4 is on the right of 3, and 5 is on the right of 4.
5. Comparing size: Comparing size refers to judging the size relationship between two numbers. For each number of 1-5, we can judge their size by number axis or direct comparison. For example, 1 is less than 2, 2 is less than 3, 3 is less than 4 and 4 is less than 5.
In the world of mathematics, numbers are the foundation of everything. Whether it is simple addition, subtraction, multiplication and division or complex calculus, numbers are indispensable. Numbers are a way for us to know the world and a tool for us to solve problems. First, we need to know what a number is. At the most basic level, numbers are symbols used to represent quantities. For example, we can use an apple to represent the number of a unit, or we can use the word "one" to represent the same concept.
However, with the deepening of our understanding of the world, the concept of number is becoming more and more complicated. We began to introduce negative numbers to represent debts or liabilities; We began to introduce fractions to express some concepts; We began to introduce irrational numbers to represent quantities that cannot be accurately expressed by rational numbers. These are the development and expansion of numbers, which make our mathematical world richer and more diverse. In the development of numbers, we also found some important laws.