Integers

Negative numbers represent values below zero and positive numbers represent values above zero.

Example: above or below sea level.

1+ (-2) = (-1) is an addition statement.
3 (-1) = 4 is a subtracting question.


Opposite integers have the same numeral but different sign
example: 3 and (-3)

(+) + (+)...........  (+) - (-)
(-) + (-).............  (-) - (-)
(+) + (-)............  (+) - (- )
(-) + (+).............  (-) - (+)

You can fill in those signs to make questions then you can be able to practice forever.
So practice with different numerals in each situation.