1. Addition & Subtraction ©2009 G Dear – Not to be sold/Free to use
Stage 4
Years 7 & 8
Directed
Numbers
Addition & Subtraction
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©2009 G Dear – Not to be sold/Free to use

2. +3 1 + 2 Addition  Minus (-) Direction Plus (+) Direction 
 Minus (-) Direction +3
Plus (+) Direction 
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3. +4 0 + 4 Addition  Minus (-) Direction Plus (+) Direction 
 Minus (-) Direction +4
Plus (+) Direction 
End of
Slide

4. +2 -3 + 5 Addition  Minus (-) Direction Plus (+) Direction 
 Minus (-) Direction +2
Plus (+) Direction 
End of
Slide

5. -2 -4 + 2 Addition  Minus (-) Direction Plus (+) Direction 
 Minus (-) Direction -2
Plus (+) Direction 
End of
Slide

6. +2 4 - 2 Subtraction  Minus (-) Direction Plus (+) Direction 
 Minus (-) Direction +2
Plus (+) Direction 
End of
Slide

7. 3 - 3 Subtraction  Minus (-) Direction Plus (+) Direction 
 Minus (-) Direction
Plus (+) Direction 
End of
Slide

8. -2 2 - 4 Subtraction  Minus (-) Direction Plus (+) Direction 
 Minus (-) Direction -2
Plus (+) Direction 
End of
Slide

9. -3 4 - 7 Subtraction  Minus (-) Direction Plus (+) Direction 
 Minus (-) Direction -3
Plus (+) Direction 
End of
Slide

10. -4 -2 - 2 Subtraction  Minus (-) Direction Plus (+) Direction 
 Minus (-) Direction -4
Plus (+) Direction 
End of
Slide

11. -3 -1 - 2 Subtraction  Minus (-) Direction Plus (+) Direction 
 Minus (-) Direction -3
Plus (+) Direction 
End of
Slide

12. -4 -1 - 3 Subtraction  Minus (-) Direction Plus (+) Direction 
 Minus (-) Direction -4
Plus (+) Direction 
End of
Slide

13. -3 0 - 3 Subtraction  Minus (-) Direction Plus (+) Direction 
MathScape Ex 7.4
 Minus (-) Direction -3
Plus (+) Direction 
End of
Show