1. Warm Up-- Simplify 1.) -25 - 18 = 2.) 8 - 14 = 3.) -34 - (-23) =
4.) 6 - (-13) =
5.) =
6.) =
-43 -6 11 19 4
-17

2. To be able to Multiply with positive and negative numbers.
Today’s Objective
To be able to Multiply with positive and negative numbers.

3. Rules Concept
3 * 2 means = 6
3 * -2 means = -6

4. Multiply Rules 1.) + x + = + (3 * 2 = 6) 2.) - x - = + ( -3 * -2 = 6)
Same signs = positive
3.) + x - = (3 x -2 = -6)
4.) - x + = (-3 x 2 = -6)
Different signs = negative

5. Examples 1.) -2 * 5 = 2.) -3 * -8 = 3.) 6 * 9 = 4.) 5 * -5 =
5.) -2 * * -3 =
6.) -2(11 - 6) =
-10 24 54
-25 2
-10

6. Now you try these 1.) -3 * 6 = 2.) -4 * -8 = 3.) 7 * 8 = 4.) 6 * -5 =
5.) -3 * * -4 =
6.) -3(12 - 7) =
-18 32 56
-30 14
-15

7. More For You to try 7.) -3 * 0 = 8.) 4 * -3 + 4 * 7 =
9.) -2 * -2 * -2 =
10.) -2 * -2 * -2 * -2 =
11.) -1/2 *-1/2 =
12.) -1(12 - 7) = 16 -8 16
1/4 -5

8. Classwork
Home work pg Pg. 27 –29 # 1 – 31, #