Adding and Subtracting Integers

For question a) you would do 8-5 and because it's a positive plus a negitive, the answer would be -3. For question b) I did 10-4 and for the answer I got a positive 6. Question c) i did 4 minus 9 and i got -5. Question d) I did 9-8 and got 1 so the answer is -1 because a negative - a negative = a positive. Integer game 1:  http://bit.ly/d03HPS, Game2: http://www.mathwizz.com/integers/page1.htm, game 3: http://bit.ly/E9a4D score 1: http://www.math-play.com/multiplying-and-dividing-integers-game.html score2: http://www.mathwizz.com/integers/page1.htm score3: http://www.shodor.org/interactivate/activities/ArithmeticFour/