Editing Negative number (section)

==Introduction==
===The number line===
{{Main|Number line}}
The relationship between negative numbers, positive numbers, and zero is often expressed in the form of a '''number line''':
[[File:Number-line.svg|center|The number line]]
Numbers appearing farther to the right on this line are greater, while numbers appearing farther to the left are lesser. Thus zero appears in the middle, with the positive numbers to the right and the negative numbers to the left.

Note that a negative number with greater magnitude is considered less. For example, even though (positive) {{math|8}} is greater than (positive) {{math|5}}, written
{{block indent | em = 1.5 | text = {{math|8 > 5}} }}
negative {{math|8}} is considered to be less than negative {{math|5}}:
{{block indent | em = 1.5 | text = {{math|−8 < −5.}} }}

===Signed numbers===
{{main|Sign (mathematics)}}
In the context of negative numbers, a number that is greater than zero is referred to as '''positive'''. Thus every [[real number]] other than zero is either positive or negative, while zero itself is not considered to have a sign. Positive numbers are sometimes written with a [[plus sign]] in front, e.g. {{math|+3}} denotes a positive three.

Because zero is neither positive nor negative, the term '''nonnegative''' is sometimes used to refer to a number that is either positive or zero, while '''nonpositive''' is used to refer to a number that is either negative or zero. Zero is a neutral number.

===As the result of subtraction===
Negative numbers can be thought of as resulting from the [[subtraction]] of a larger number from a smaller. For example, negative three is the result of subtracting three from zero:
{{block indent | em = 1.5 | text = {{math|1= 0 − 3  =  −3.}} }}
In general, the subtraction of a larger number from a smaller yields a negative result, with the magnitude of the result being the difference between the two numbers. For example,
{{block indent | em = 1.5 | text = {{math|1= 5 − 8  =  −3}} }}
since {{math|1=8 − 5 = 3}}.