Is it okay to look at the addition and subtraction of absolute values as , and then follow the norma

—0|See what to do? Is it considered 0?

For example—|—2|Is it equal to a positive or negative number? -2

For example—|—2|Is it equal to a positive or negative number? 2

For example—|+2|Is it equal to a positive or negative number? -2

For example—|+2|Is it equal to a positive or negative number? 2

The key here is how to calculate the absolute value, that is, how to remove the absolute value part of the equation including the absolute value symbol.

When the absolute value symbol is a number greater than or equal to 0, the absolute value symbol is removed.

When the absolute symbol is a number less than 0, replace the absolute symbol with parentheses, and add a negative sign before the parentheses.

Not exactly, analyze the specific problem and see if there is a way to make a simple calculation that can be solved within the absolute value, so you don't always need to change the sign.

For example—|—2|Is it equal to a positive or negative number?

is negative. For example—|—2|Is it equal to a positive or negative number?

is a positive number. For example—|+2|Is it equal to a positive or negative number?

Negative number. For example—|+2|Is it equal to a positive or negative number? Positive number.

|—2|Equal to -2

2|Equal to 22|Equal to -2

2|Equal to -2

The absolute value is a non-negative number after this operation. Outside of the absolute value symbol, use the normal arithmetic.

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When two positive numbers are added, the absolute value is equal to the number they get when they are added.

When two negative numbers are added, the absolute value is equal to the opposite of the number they give when they are added.

Add a positive and a negative number:

The value of a positive number is greater than the value of a negative number minus the negative sign, and the absolute leakage value is equal to their sum;

The value of a positive number is less than the value of a negative number minus the negative sign, and the absolute value is equal to the opposite number after they are added.

Two negative numbers are subtracted, and the absolute value is equal to the value of the larger number minus the smaller number after they have removed the negative sign.

Subtract two positive numbers, and the absolute value is equal to the smaller value of the larger side search of them.

Subtract the numbers of one positive and one negative:

The absolute value of the positive number minus the negative number is equal to the value of the positive number plus (the negative number minus the negative sign);

The negative number minus the positive number is equal to the negative number, and the positive number is added after the negative sign is removed; ( Equal to value) to follow the rules of the operation, if there is an absolute value, you must first calculate the number within the absolute value.

The absolute value is the distance from the point to the origin of a number on the number line, denoted by "|".to dedicate.|b-a|or |a-b|Represents the distance between a point representing a and a point representing b on the number line.

In mathematics, absolute or modulus | x |, regardless of its sign, i.e., | x |x represents positive x, | x |x means negative x (-x is positive in this case), |0 | 0。For example, the absolute value of 3 is 3, and the absolute value of -3 is also 3. The absolute value of a number can be considered as the distance from zero.

The generalization of the absolute value of real numbers occurs in a wide variety of mathematical settings, such as complex numbers, quaternions, ordered rings, fields, and vector spaces to define absolute values. Absolute values are closely related to the concepts of size, distance, and norm in a variety of mathematical and physical environments.

In the first method, the absolute value is found first, and then the addition and subtraction are performed.

In the second method, if the value in the absolute value sign is the same, you can add the subtraction first and then find the absolute value; If the numbers are different, change the sign of one of the values and add or subtract them to find the absolute value.

To put it simply, the number after removing the absolute sign must be at 0, such as |-8|+|7｜＝8+7＝15；If it is an unknown number, such as x y, if x y, x y = x-y; If x

|x|It represents the distance from the x point on the number line to the origin, so when x is positive, |x|=x, when x is negative, |x|=-x, so |-8|=8，|7|=7，|-8|+|7|=15.

The absolute value of x |x|It means that when x>=0, |x|=x;When x<0, |x|=-x

Put the absolute value. 1.Assuming that a, 3 a are non-negative; ｜a｜＋｜3－a｜=a+3-a=3

Non-negative, 3 a is negative, a 3 a = a 3 a = a + (-3-a) = ....

is negative, 3 a is non-negative, a 3 a = -a + 3-a = ...

That's right! Just remember that both positive and negative absolute values are positive.

An absolute value of 0 is fine.

The absolute value of a negative number is its opposite).

Or this is simpler - the absolute value of a negative number is to remove the negative sign, and the absolute value of a positive number is still itself.

After removing the absolute value symbol, you can calculate it according to the addition and subtraction method of elementary school!

After squared in the open roots, consider a variety of situations.