Negative number is a mathematical term. Numbers less 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 (minus sign).

Symbol, equivalent to minus sign) "-"and a plus sign, such as? 2 stands for the antonym of 2.

2. Positive number: a number greater than 0.

Positive number is a mathematical term, and numbers greater than 0 are called positive numbers (positive

Number), 0 itself is not a positive number. Positive numbers and negative numbers represent quantities with opposite meanings. Positive numbers are usually preceded by a "+"symbol, which can usually be omitted, and negative numbers are marked with a minus sign (minus sign).

Symbol, equivalent to minus sign) "-"and a plus sign, such as? 2 stands for the antonym of 2.

0 is neither positive nor negative.

note:

1, the letter a can represent any number, and when a represents a positive number, -a is a negative number; When a is negative, -a is positive; When a represents 0, -a is still 0.

2. Sometimes "+"can be added before positive numbers, and sometimes "+"can be omitted. Therefore, the positive sign omitting "+"is a positive sign.

Extended data

Negative numbers first appeared in the "Equation Chapter" of Nine Chapters Arithmetic compiled by the Western Han Dynasty (206 BC-25 AD).

In Nine Chapters Arithmetic, in addition to introducing the concept of positive and negative numbers, the addition and subtraction algorithm of positive and negative numbers-"addition and subtraction" is also fully described.

That is, "the same name has points, different names are beneficial, no negative, negative and incorrect; Its synonyms are divided, and the same name is beneficial, without positive, negative and negative points. "

The first half of this passage is about the law of subtraction, and the second half is about the law of addition.

It means: the subtraction of two numbers with the same sign is equal to the subtraction of their absolute values, and the subtraction of two numbers with different signs is equal to the addition of their absolute values; Zero negative is negative, and zero negative is positive.

The addition of two numbers with different signs is equal to the subtraction of their absolute values; The addition of two numbers with the same sign is equal to the addition of their absolute values; Zero plus is positive and zero plus negative is negative.

Sogou encyclopedia-positive number

Sogou encyclopedia-negative number