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

2. Multiplication of Directed Numbers
+x+ }+
-x-
Like Signs
+x- }-
MathScape Ex 7.4
-x+
Unlike Signs

3. Multiplication of Directed Numbers
+3 x -2 = - 6
+3 x +4 = + 12
-4 x +5 = - 20
MathScape Ex 7.4
-3 x -2 = + 6

4. Multiplication of Directed Numbers
-5 x -3 = + 15
+3 x -7 = - 21
+9 x +2 = + 18
MathScape Ex 7.7
-6 x +3 = - 18

5. Division of Directed Numbers
+÷+ }+
-÷-
Like Signs
+÷- }-
MathScape Ex 7.4
-÷+
Unlike Signs

6. Division of Directed Numbers
-15 ÷ -3 = + 5 - 6
+42 ÷ -7 =
+20 ÷ +2 = + 10
MathScape Ex 7.7
-36 ÷ +3 = - 12

7. Division of Directed Numbers
-22 ÷ 11 = - 2
+25 ÷ -5 = - 5
+27 ÷ +3 = + 9
MathScape Ex 7.7
-44 ÷ +4 = - 11