ㄧ-4ㄧ=ㄧ+4ㄧ=4

-ㄧ-4ㄧ=-4

It means: it represents the actual distance from the point on the number axis to the origin (it will never be negative).

Three laws: the absolute value of a positive number is itself.

The absolute value of zero is zero (the most difficult to apply). The absolute value of a negative number is its inverse (positive number).

For example: A < 0, then ㄧㄧ a =-a (-a) is a positive number.

Extended data:

In computer language, the binary number of a positive number is 0, and the binary number of a negative number is 1.

In a 32-bit system, the number of bytes is 4, and the function of finding the absolute value is abs(x).

No matter the algebraic meaning or geometric meaning of absolute value, the following related properties of absolute value are revealed:

(1) The absolute value of any rational number is a number greater than or equal to 0, which is not negative.

(2) There is only one number whose absolute value is equal to 0, which is 0.

(3) There are two kinds of numbers whose absolute values are equal to the same positive number, and these two numbers are opposite or equal.

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