Find some negative numbers and talk about their meanings.

Negative numbers are mathematical terms, and negative numbers and positive numbers represent quantities with opposite meanings.

Negative numbers are marked with a negative sign "-"and a positive number, for example? 2 stands for the antonym of 2.

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

A negative number is the reciprocal of its absolute value.

On the number axis, negative numbers are all on the left of 0, and the earliest record of negative numbers is China's ancient mathematical work "Nine Chapters Arithmetic". In the calculation, it is stipulated that "positive calculation is red and negative calculation is black", that is, red calculation is used to represent positive numbers and black is used to represent negative numbers. Comparing the sizes of two negative numbers, the absolute value is larger but smaller.