
Numbers on a
number line. 




Temperatures on a thermometer:
Temperatures
above zero degrees are positive (+10) and
temperatures below zero degrees are negative
(10).



Sports scores:
If your favorite
football team gained 4 yards during the big game, it could be represented by +4.
Should your team lose 4 yards, it could be represented by –4.



Weight gain and loss:
Sam
gained 8 pounds while on a Caribbean cruise (+8), but lost the 8 pounds after he returned
home (8).



Geography:
A location in Death Valley has an elevation of 282
feet (which is below sea level), while a location near Coffin Peak has an elevation of +282
feet (which is above seal level).



Altitude:
An airplane leaves
the airport and climbs to an altitude (height) of 2500 feet (+2500). To land, the plane
must lose 2500 feet of altitude (2500).



Profit and loss:
A candy store
lost $28,400
(28,400) the first year of business but recovered the amount (+28,400) the
second year.



Recorded time:
When referring
to historical times, 2000 years BC (2000) can be compared to 2000 years AD (+2000).



Elevator movement:
The elevator
went up 15 floors
(+15), and then went down 15 floors (15).

