1. The Integer Family Developed by Ivan Seneviratne

2. Integer Addition

3. A Positive Plus a Positive You add and make it positive. +3 + +9 =+3 + +9 = +12

4. A Negative Plus a Negative You add and make it negative. -3 + -9 = -3 + -9 = -12 - 3 - 9 = -12

5. A Positive Plus A Negative Subtract the absolute values and then you take the sign of, the farthest one from zero. +3 + -9 = -3 + +9 = +3 + -9 = -6 -3 + +9 = +6

6. Integer Subtraction Developed by Ivan Seneviratne

7. Integer Subtraction You have to add the opposite. Keep it, change it, change it. Then follow the adding rules. +3 -+9 = +3 -+9 = -6 -3 - - 9 =-3 - - 9 = +6

8. +3 -+9 = -3 - -9 = -3 - +9 = +3 - -9 = +3 -+9 = -6 -3 - -9 = 6 -3 - +9 = -12 +3 - -9 = 12

9. Integer Multiplication & Division

10. Multiplication and Divide The signs the same its positive. -3 (-7) = Its negative if they’re not. 3 (7) = -3 (7) = -213 (-7) = -3 (-7) = +213 (7) = +21 -3 (7) =3 (-7) = -21

11. -3 (-9) = -3 - +9 = +3 - +9 = -3 (-8) = -3 - +9 = -12 +3 - +9 = -6 -3 (+9) = -2 (-9) = -3 - -9 = +3 (+9) = -3 (+9) = -27 -3 (-8) = 24 -3 (-9) = +27 +3 (+9) = +27 -3 - -9 = +6 -2 (-9) = +18

12. -3 - -9 = -3 - + 9 = +2 - -9 = -7 - - 9 = -3 - -9 = -6 -3 - + 9 = -12 +2 - -9 = -7 -7 - -9 = +2 2 (-9) = -3 (8) = +4 (-9) = +5 (+6) =+5 (+6) = +30 2 (-9) = -18 +4 (-9) = -36 -3 (8) = -24

13. This presentation is developed by Ivan Seneviratne © 2006 purely for personal use. ivanthexplorer@yahoo.co.uk