Warm Up-- Simplify 1.) -25 - 18 = 2.) 8 - 14 = 3.) -34 - (-23) = 4.) 6 - (-13) = 5.) 5 + 6 - 7 = 6.) -9 -14 + 6 = -43 -6 11 19 4 -17
To be able to Multiply with positive and negative numbers. Today’s Objective To be able to Multiply with positive and negative numbers.
Rules Concept 3 * 2 means 2 + 2 + 2 = 6 3 * -2 means -2 + -2 + -2 = -6
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
Examples 1.) -2 * 5 = 2.) -3 * -8 = 3.) 6 * 9 = 4.) 5 * -5 = 5.) -2 * 5 - 4 * -3 = 6.) -2(11 - 6) = -10 24 54 -25 2 -10
Now you try these 1.) -3 * 6 = 2.) -4 * -8 = 3.) 7 * 8 = 4.) 6 * -5 = 5.) -3 * 6 - 8 * -4 = 6.) -3(12 - 7) = -18 32 56 -30 14 -15
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
Classwork Home work pg Pg. 27 –29 # 1 – 31, #33 - 46