An easy way to teach kids intergers is a time line so they can see it. Lets say that proble is -5+9=
pic
You would start at zero then move five places to the left
(draw an arrow to help see)
then from that -5 you would move 9 places to the right
pic
the number they land on is the final answer and that would be 4… -5+9=4
I personly think that be able to see it helps out alot.
kitchy18 