What is a negative number? What does a negative number mean

Numbers less than 0 are negative.

Negative numbers: like -1, -2, -3......Such numbers less than 0 are called negative. The "-" in front of a negative number is called a negative sign.

Application Tips] 0 is neither positive nor negative, it is the boundary between positive and negative numbers.

How to read negative numbers: "- read as "negative". When reading negative numbers, read the negative sign first and then read the number after the negative sign to call the start, the negative sign is followed by the number, and the number is read after the negative number.

How to write negative numbers: When writing negative numbers, be sure to write "-".

Application of negative numbers: Positive and negative numbers can be used to represent quantities with opposite meanings.

Negative numbers can be widely used in temperature, floor, altitude, water level, profitability, production increase and decrease, expenditure, income, score, deduction and so on.

The introduction of negative numbers is a valuable asset that ancient mathematicians in China have dedicated to the world's mathematics. After the introduction of the concept of negative numbers, the set of integers and rational numbers was completely formed.

Negative numbers are a mathematical term, numbers smaller than 0 are called negative numbers, and negative numbers and positive numbers represent quantities with opposite meanings.

Any positive number preceded by a negative sign becomes a negative number. A negative number is the opposite of its absolute value. On the number axis, negative numbers are on the left side of 0, and the earliest record of negative numbers is the ancient mathematical work "Nine Chapters of Arithmetic" in China.

It is specified in the calculation"Positive is red, negative is black", that is, the red arithmetic chip is used to represent a positive number, and the black number is a negative number. The two negative numbers are compared to the size, and the absolute value is larger than the smaller.

Applications

Negative numbers can be widely used in temperature, floors, altitude, water level, profitability, increase or decrease in production, expenditure, income, score, deduction points, and so on. He is currently in the sixth grade of primary school. (There are also schools in the first year of junior high school).

A negative number is a number smaller than zero, the negative number is on the left side of the number axis, and zero is the dividing line between positive and negative numbers. Negative numbers are commonly used in front of them"-"number. Negative numbers are divided into negative integers and negative fractions. Negative numbers are made up of rational and irrational numbers, such as: - 2

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Negative numbers are a mathematical term, numbers smaller than 0 are called negative numbers, and negative numbers and positive numbers represent quantities with opposite meanings. Negative numbers are marked with a minus sign" and a positive number, such as 2, which represents the opposite of 2. Thus the void cracks, and any positive number preceded by a negative sign becomes a negative number.

A negative number is the opposite of its absolute value.

If the negative numbers are all smaller than zero, then the negative numbers are all smaller than the positive numbers. Zero is neither positive nor negative. Then -a.

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

The negative sign before removing the negative number is equal to the absolute value of the negative number.

For example, the absolute value of -2 is 2, the absolute value of -45 is 45, and so on.

Fractions can also be negative, e.g. -2 5.

The square root of a negative number is represented by an imaginary unit "i". The largest negative integer is: 1. There is no smallest negative number for the informed.

Negative numbers are real numbers. Real numbers can be divided into rational numbers and irrational numbers, and rational numbers can be divided into positive rational numbers, zeros, and negative rational numbers. A negative number is a negative rational number.

Real numbers are a general term for rational and irrational numbers. Mathematically, a real number is defined as a number that corresponds to a real number, a point on the number line. Real numbers can be intuitively seen as finite decimals and infinitesimal decimals, and real numbers correspond to points on the number line one-to-one.

But mere enumeration does not describe the totality of real numbers. Real and imaginary numbers together form complex numbers.

Basic information about negative numbersIf the negative numbers are all smaller than zero, then the negative numbers are all smaller than the positive numbers. Zero is neither positive nor negative. Then -a.

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

The negative sign before removing the negative number is equal to the absolute value of the negative number.

For example, the absolute value of -2 is 2, the absolute value of -45 is 45, and so on.

Fractions can also be negative, e.g. -2 5.

The square root of a negative number is represented by an imaginary unit "i". (There is no square root for negative numbers in the range of real numbers).

The largest negative integer is: 1.

There is no minimum negative number.

It reads as follows:

1: A quantity in the opposite sense is two numbers in different directions relative to the datum point (0 point), and their absolute values.

It doesn't matter if it's equal or not.

For example: +100 and -10 are quantities of opposite significance, and +50 and -50 are also quantities of opposite significance. (Whether the numbers are the same or not does not affect the amount of the opposite meaning).

2: In a pair of quantities with opposite meanings, if one of them is specified as positive, then the other is denoted as negative.

For example: $10 for income and $10 for expenses. (Total: Income +10, Expenses -10).

3: Quantities of opposite meanings are two numbers that represent the same meaning.

For example: a 2 cm increase in height and a 2 kg loss in weight. (2 cm for height and 2 kg for weight, not the amount in the opposite sense).

1) Realize that negative numbers are generated in production and life, and use positive and negative numbers to express quantities with opposite meanings, and be able to classify rational numbers as required.

2) A negative number is the opposite of a positive number.

In real life, we often use positive and negative numbers to represent two quantities with opposite meanings. In summer, the temperature in Wuhan is as high as 42°C, you will think that Wuhan is indeed like a furnace, and in winter, the temperature in Harbin is -32°C, a minus sign makes you feel the cold of the northern winter.

3) Ancient Chinese mathematicians used to use different colors to distinguish them, in ancient times it was called "positive calculation black, negative calculation red" Nowadays, this method also uses the so-called "deficit" when keeping accounts.

A negative number is a number that is less than zero. The symbol is "-".