Negative/positive number =-(negative/positive number) = negative number

Negative number 1 negative number 2= (negative number1divided by negative number 2) = positive number.

Generally speaking, dividing by the same symbol equals a positive number, and dividing by different symbols equals a negative number.

Definition of positive numbers: Numbers greater than 0 are called positive numbers.

A number greater than 0. If a number is greater than zero (> 0), it is called positive number × positive number, which can be represented by the plus sign "+". There are countless kinds of positive numbers, including positive integers, positive fractions and positive irrational numbers.

Geometric meaning of positive numbers: The numbers to the right of 0 on the number axis are called positive numbers and negative numbers.

Any positive number preceded by a negative sign is equal to a negative number. Negative number is less than zero, positive number is on the number axis, negative number is on the left of 0, and there is no.

Negative numbers have maximum and minimum values, and all negative numbers are less than natural numbers and less than zero (:

What do positive numbers and negative numbers mean?

Numbers less than 0 are called negative numbers, and numbers greater than 0 are called positive numbers.

What they mean is the relationship between numerical value and zero. Greater than zero is positive, less than zero is negative.

Positive numbers are positive real numbers, including positive integers, positive fractions (including positive decimals) and positive irrational numbers. And positive integers are only a small part of positive numbers.

There is neither a minimum number nor a maximum number in negative numbers.

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1, according to historical records, as early as two thousand years ago, China had the concept of positive and negative numbers and mastered the algorithm of positive and negative numbers. Liu Hui, a scholar in China during the Three Kingdoms period, made great contributions to the establishment of the concept of negative numbers. Liu Hui first gave the definitions of positive numbers and negative numbers. He said: "Today, the gains and losses are the opposite, so we should name them with positive and negative signs." This means that positive numbers and negative numbers should be used to distinguish between quantities with opposite meanings in the calculation process.

2. Liu Hui gave the method of distinguishing positive and negative numbers for the first time. He said: "The front is red and the negative is black; Otherwise, the number of the red pendulum represents a positive number, and the number of the Hei Bang pendulum represents a negative number; You can also use a stick with an oblique pendulum to represent negative numbers, and a stick with a positive pendulum to represent positive numbers. In China's famous ancient mathematical monograph "Nine Chapters of Arithmetic" (written in the first century AD), the law of addition and subtraction of positive and negative numbers was put forward for the first time: "Positive and negative numbers say: the same name is divided, different names are beneficial, the positive and negative are not negative, and the negative is not correct; Its synonyms are divided into two parts, the same name is beneficial, and there is no positive or negative. "Here, the name is a number, except subtraction, mutual benefit and division are the absolute values of two numbers, and nothing is zero.

3. In the present words: "The addition and subtraction of positive and negative numbers means that the subtraction of two numbers with the same symbol equals the subtraction of their absolute values, and the subtraction of two numbers with different symbols equals the addition of their absolute values. Zero minus a positive number is a negative number, and zero minus a positive number. Adding two numbers with different signs is equal to subtracting their absolute values, and adding two numbers with the same signs is equal to adding their absolute values. Zero plus positive number equals positive number, and zero plus negative number equals negative number. " This statement about the arithmetic of positive and negative numbers is completely correct and completely in line with the current law! The introduction of negative numbers is one of the outstanding contributions of mathematicians in China.