1. Positioning: Determine the number of objects to be counted, such as apples and books.
2. Counting: from 1, assign a number to each object in turn until all objects are assigned numbers.
3. Record: Record each number and combine them into a number.
4. Position counting: If the number of objects to be counted changes, the counting unit (such as hundred, thousand, ten thousand, etc.) needs to be determined again. ) and count.
The counting method of natural numbers is simple, accurate and easy to operate. On the basis of natural numbers, the counting range can be further expanded. For example, the counting method of negative numbers is the reciprocal algorithm (that is, the same symbols add up to get positive numbers, and different symbols add up to get negative numbers); Scientific notation is to separate the decimal part from the integer part of a number and express it by scientific notation (that is, a× 10n).
The help of natural numbers to mathematical research;
1, Description and Measurement: Natural numbers can be used to describe and measure various concepts and objects in mathematics. For example, in counting and permutation and combination, natural numbers can be used to measure the number of objects and describe the permutation and combination relationship between objects.
2. Building a mathematical system: Natural numbers can be used to build various branches in a mathematical system. For example, in algebra and number theory, natural numbers can be used to construct more complex number systems such as integers, rational numbers, real numbers and complex numbers.
3. Studying mathematical objects: Natural numbers can be used to study the properties and characteristics of various mathematical objects. For example, in geometry and graph theory, natural numbers can be used to describe and study the number of edges and angles of graphs, and to study plane geometry and solid geometry in space.
4. Describe the possibility of an event: Natural numbers can be used to describe the possibility of an event. For example, in probability, natural numbers can be used to calculate concepts such as probability and expectation.
5. Computer Science: Natural numbers play an important role in computer science. Computers use binary systems to represent and process information, in which natural numbers are the basis of binary coding and algorithm design. Integer operation, sorting algorithm and graphic algorithm in computer science are all directly related to natural numbers.