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.
Extended data
Negative numbers are antonyms of positive numbers. In real life, we often use positive numbers and negative numbers to represent two quantities with opposite meanings. In summer, the temperature in Wuhan is as high as 42℃, and you will feel that Wuhan is really like a stove. The minus sign of the temperature in Harbin in winter is -32℃, which makes you feel the cold in winter in the north.
China people have been using negative numbers for a long time. The famous chapter "Equation" in China's ancient mathematical work "Nine Chapters Arithmetic" formally introduced negative numbers and their addition and subtraction algorithms for the first time in the history of mathematics in the world, and gave an algorithm called "addition and subtraction". Liu Hui, a mathematician in Wei and Jin Dynasties, used counting tools of different colors (rod counting tools) to represent positive numbers and negative numbers (red is positive and black is negative) in his book "Notes on Nine Chapters of Arithmetic".
Resources Baidu Encyclopedia-Negative Numbers