Integers

Maybe this will help

http://web2.0calc.com/questions/positive-and-negative-numbers-directed-numbers

negative times a negative is a negative.  negative times a positive is a negative.  when you subtract two negative numbers you add them for example -6-5  in your head think 6+5=11  now just add a negative sign and thats the answer when you add a negative and a positive its like subtracting like -10+3 you think in your head whats 10-3? its seven just add a negative sign.  sometimes you will have a double negative like -6-(-4) if you look at the parenthesis and the two negative signs if you were to make a line through it you would have an addition sign do that immediately and it will make it easier so then -6+4=-2 . Practice makes perfect :)