What is the significance of positive and negative numbers, and what is the concept of positive and n

0 is neither positive nor negative, larger than 0 is called positive, and smaller than 0 is called negative. If 0 represents a standard, a negative number means less than the standard, and a positive number is more than the standard. The simplest answer. Support me!

The concept of positive and negative numbers cannot be simply understood as: the number with the " " sign is a positive number, and the number with the " " sign is a negative number. For example:

Does it have to be negative? The answer is not necessarily. Because the letter can represent any number, if it is positive, it is negative; When 0 is described, a negative sign is added in front of 0, which is still 0, and 0 does not distinguish between plus or minus; When represents a negative number, it is not a negative number, it is a positive number.

2. After the introduction of negative numbers, the range of numbers is expanded to rational numbers, and the extension of odd and even numbers is also expanded from natural numbers to integers, and integers can also be divided into two categories: odd numbers and even numbers, and the numbers that can be divisible by 2 are even numbers, such as....－6，－4，－2，0，2，4，6…, a number that is not divisible by 2 is an odd number, such as....－5，－4，－2，1，3，5…

There are five categories of 3. Number subdivision: positive integers, positive fractions, 0, negative integers, and negative fractions, but when studying problems, rational numbers are usually divided into three categories: positive, 0, and negative, and are discussed.

4. Positive numbers and 0 are usually referred to as non-negative numbers, negative numbers and 0 are collectively referred to as non-positive numbers, and positive integers and 0 are called non-negative integers; Negative integers and 0s are collectively referred to as non-positive integers.

Depending on how you use it, there are different numbers in mathematics, not to mention positive numbers, and negative numbers are to avoid being inexpressible.

In fact, it is very simple, write a number as 0, take this "0" as the standard, the + sign represents "0" or more, and the - sign represents "0" or less. It can also be used to represent quantities in the opposite sense.

Describe a quantity that has the opposite meaning.

Just like there are men and women in the world.

A number greater than zero is called a positive number, a number less than zero is a negative number, and zero is neither a positive nor a negative number.

Negative numbers are the same absolute values.

The opposite of a positive number. Any positive number preceded by a negative sign equals a negative number. On the number axis, the negative numbers are to the left of 0, and all the negative numbers are better than the natural numbers.

Small. Negative numbers are marked with a negative sign "". There are an infinite number of positive numbers, including positive integers.

Positive fractions and positive irrational numbers. The geometric meaning of positive numbers: the points that represent positive numbers on the number line are all to the right of 0 on the number line.

Plus or minus

Indicates positive or negative, and positive and negative signs can be used in mathematics to represent the positive or negative or logarithm of rational numbers.

Perform four arithmetic.

Addition and subtraction in . The positive and negative signs are not a single concept in middle school physics, some of them are equivalent to the positive and negative of rational numbers in mathematics, and some are used to represent physical quantities.

The nature and direction of the situation are more complicated.

In mathematics, such as |a|=2 (absolute) then the actual value of a is 2. Numbers larger than 0 are called positive numbers, and there is often a symbol "+" in front of positive numbers, which can usually be omitted and not written, and there are countless positive numbers, including positive integers, positive fractions and positive irrational numbers. A number smaller than 0 is called a negative number, and a negative number and a positive number represent a quantity with opposite meanings.

Negative numbers are marked with a negative sign " " and a positive number.

The above content reference:Encyclopedia – plus or minus

The meaning is as follows:

The meaning of positive and negative numbers is:Indicates two quantities with opposite meanings

Conceptually, a number smaller than 0 is called a negative number, and a number larger than 0 is called a positive number. They represent the relationship between the size of the value and zero, greater than zero is a positive number, less than zero is a negative number. For example, a temperature that is relatively low to 0 is called a sub-zero temperature.

A temperature higher than 0 is called the upper-zero temperature. The temperature above zero and the temperature below the zero circle are expressed as positive and negative numbers respectively, which reveals that the meaning of positive and negative numbers is to describe the opposite number of the two quarrels.

Characteristics of "positive and negative":

In the past, students were often prone to make mistakes in comparing the magnitude of negative numbers, and the reason for this was the number line.

of'The teaching content is not in place. In teaching, I grasp the knowledge point of the number axis, so that students can make it clear that the numbers to the right of 0 are all positive, and the numbers to the left of 0 are negative. On the number line, the order from left to right is the order from the smallest to the largest.

For example, a comparison of -2 and -4: -2 is larger than -4 because -2 is close to 0.

Positive and negative numbers have opposite meaningful quantities.

o is neither positive nor negative. A number greater than o is called a positive number, and a number smaller than o is called a negative number.

Definition of positive and negative numbers:

Positive: If a number is greater than zero, it is said to be a positive number, and a positive number can be preceded by a positive sign.

There are an infinite number of positive numbers, which are divided into positive integers.

Positive fractions and positive irrational numbers, the geometric meaning of positive numbers in the geometric sense is the number axis.

The number to the right of the upper origin 0 is called a positive number.

Negative: Any positive number preceded by a negative sign equals a negative number. Negative numbers are smaller than zero, and also smaller than positive numbers, in the geometric sense, the geometric meaning of negative numbers is the number to the left of the origin 0 on the number axis, there is no maximum and minimum negative number, all negative numbers are better than natural numbers.

Small, smaller than zero, can be marked with a minus sign, which is equivalent to a minus sign.

If mine helps you, please click "".

Positive number (zhèng

shù)1 Definition: A number greater than 0 is called a positive number.

1) Numbers greater than 0. If a number is greater than zero (>0), it is said to be a positive number A positive number can be preceded by a positive sign " " to indicate that there are an infinite number of positive numbers, which are divided into positive integers, positive fractions, and positive irrational numbers Geometric meaning.

The geometric meaning of positive numbers: The number to the right of 0 on the number axis is called a positive number.

Introduction to negative numbers.

Any positive number preceded by a negative sign equals a negative number.

Negative numbers are smaller than zero, and positive numbers are smaller.

On the number axis, the negative numbers are to the left of 0, no.

There are maximum and minimum negative numbers, all of which are smaller than the natural number and smaller than zero (<0).

The number is marked with a minus sign (i.e., equivalent to a minus sign)" such as -2, -45, etc.

Numbers greater than 0. If a number is greater than zero (>0), it is said to be a positive number A positive number can be preceded by a positive sign " ", but when there is no number in front of it, the positive sign is usually omitted and not written

Numbers smaller than zero (<0) are marked with a negative sign (i.e., equivalent to a minus sign)" Positive and negative numbers are marked with zero as the dividing point.

Numbers greater than zero are positive.

A number less than zero is a negative number.

Positive and positive to get positive, negative to get positive, positive and negative to negative" refers to the multiplication formula of positive and negative numbers, the product of two positive numbers multiplied is a positive number, the product of two negative numbers multiplied is a positive number, and the product of a positive number multiplied by a negative number is a negative number.

Positive numbers are often preceded by a symbol "+", which can usually be omitted. On the number axis, positive numbers are to the right of 0. Negative numbers are on the number axis, and negative numbers are to the left of 0.

The positive sign before removing the positive number is equal to the absolute value of the positive number, and it is also equal to the positive number itself. The negative sign before removing the negative number is equal to the absolute value of the negative number.

Significance of positive and negative numbers:

1. Positive numbers indicate gains and increases, while negative numbers indicate losses and decreases.

2. The geometric meaning of positive numbers is:Number lineis greater than zero, i.e., the number line to the right of the origin. The geometric meaning of a negative number is the part of the number line that is less than zero, that is, the number line to the left of the origin.

3. Positive numbers are mathematical terms, numbers larger than 0 are called positive numbers, and 0 itself is not a positive number. Positive numbers and negative numbers represent quantities with opposite meanings. Positive numbers are often preceded by a symbol "+" that can usually be omitted and not written.

Nature of Negative Numbers:

1. If the negative numbers are smaller than zero, the negative numbers are smaller than the positive numbers. Zero is neither positive nor negative. then a<0<(+a.)

2. There is no smallest number in a negative number, and there is no largest number.

3. The negative sign before removing the negative bending skin disadvantage is equal to the absolute value of this negative number.

Such as 2, etc.: The absolute value of 2 is 2, the absolute value of 45 is 45, etc.