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What does a negative number mean?

Negative number: Numbers less than 0, such as-1, -2, -3 ... are called negative numbers. The "-"before a negative number is called a negative sign.

Applied skills

0 is neither positive nor negative, it is the dividing line between positive and negative numbers.

How to pronounce negative numbers: "-"is pronounced as "negative numbers". When reading a negative number, read the negative sign first, and then read the number after the negative sign. After the negative sign, read the negative number.

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

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

Negative numbers can be widely used in temperature, floor, altitude, water level, profit, increase and decrease of output, expenditure/income, score/deduction and so on.

The introduction of negative numbers is a precious treasure that China ancient algebras have dedicated to the world mathematics. After introducing the concept of negative number, the integer set and rational number set are completely formed.