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Negative numbers are usually written with a minus sign in front.
For example, − 3 represents a negative quantity with a magnitude of three, and is pronounced " minus three " or " negative three ".
To help tell the difference between a minus operation and a negative number, occasionally the negative sign is placed slightly higher than the minus sign.
Conversely, a number that is greater than zero is called positive ; zero is usually thought of as neither positive nor negative.
The positivity of a number may be emphasized by placing a plus sign before it, e. g..
In general, the negativity or positivity of a number is referred to as its sign.

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