Negative numbers are learned in the sixth grade of primary school. Negative numbers are mathematical terms. Numbers less than 0 are called negative numbers. Negative numbers and positive numbers represent quantities with opposite meanings.

Negative numbers are marked with a minus sign (minus sign) "-"and a positive number, such as 2, which represents the antonym of 2. Therefore, 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".

Application:

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. Now I am in the sixth grade of primary school. There is also a first-grade study. Increase production is positive and decrease production is negative. China people use negative numbers first in the world.