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Sections 2-6 and 2-8 (We combined two because we are that cool!) There will be a quiz on both of...
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Sections 2-6 and 2-8 (We combined two because we are that cool!) There will be a quiz on both of these Wednesday!
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Rule for multiplying or dividing integers (two numbers at a time) If you are multiplying or dividing numbers with the same sign (pos and pos or neg and neg) then the answer will result in a positive value Example: = 21 or -35 ÷ -7 = 5 If you are multiplying or dividing numbers with different signs (pos and neg or neg and pos) then the answer will result in a negative value Example: 5 -3 = -15 or -21 ÷ 7 = -3
Transcript of Sections 2-6 and 2-8 (We combined two because we are that cool!) There will be a quiz on both of...
Sections 2-6 and 2-8 (We combined two because we are that cool!)
There will be a quiz on both of these Wednesday!
Get a calculator and try these5 • 5 5 • -5 -5 • 5 -5 • -5
6 • 3 6 • -3 -6 • 3 -6 • -3
12 ÷ 3 12 ÷ -3 -12 ÷ 3 -12 ÷ -3
24 ÷ 8 -24 ÷ 8 24 ÷ -8 -24 ÷ -8
Do you see a pattern or rule?
Rule for multiplying or dividing integers (two numbers at a time)If you are multiplying or dividing numbers
with the same sign (pos and pos or neg and neg) then the answer will result in a positive value
Example: -3 • -7 = 21 or -35 ÷ -7 = 5If you are multiplying or dividing numbers
with different signs (pos and neg or neg and pos) then the answer will result in a negative value
Example: 5 • -3 = -15 or -21 ÷ 7 = -3
What about three or more numbers?-3 (5) (-4) what do we do now?Just multiply the numbers two at a time-3 (5) (-4) multiply -3 and 5 first-3 (5) = -15-15 (-4) = 60Try these1. -4 (8) (-2) 2. 6 (-3) (5) 3. -7 (-14) (0) 64 -90 0 Flip your handout over and do those 8 problems!
