11-4: Multiplying Integers and 11-6: Dividing Integers

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11-4 Multiplying Integers and 11-6 Dividing
Integers
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Share out

• If your partner had an idea about multiplying or
  dividing with negative numbers, please share
  their thought.

Hey- your idea was great!
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Heres a way I can Remember!

• To remember whether your answer will be positive
  or negative when MULTIPLYING or DIVIDING, well
  use

Mr. Multiplivision
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When multiplying Integers, cover the Two signs
you are using
Choral Response
What sign is left uncovered?
Ex. 5 (-3)
Negative, - That is the sign of The answer
-15
5

• Same signs

• Opposite Signs

• POSITIVE ANSWER

• NEGATIVE ANSWER

It is really that easy!!!!!
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Multiplication Practice

• (-15) (-7)
• 2. (-10)(3)
• 3. 21 ? -5
• 4. -13 ? -6
• -12 x 8
• 25 x 6
• -5 x - 36

1. -125 x 2
2. 3 x 17
3. 12 x -6
4. -18 x 7
5. -9 x -9
6. -10 x 10
7. -11 x 13
8. -8 x -9

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Division
Its not any different!
Good News
Ex. -48 ? (-4)
12
8

• (-1)(-1) ?

1
Why??
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• (-1)(-1) (-1) ?

-1
Why??
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Grade your boss work

• (4)(-7) ? (-2)
• First, (4)(-7)
• - 28
• Finish it! (-28)?(-2)

Answer 14
11
4
(-56 ? 7) ? - 2
210
5 ? -7 ? -6
- 135
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Practice

• From the text book.. Copy them down onto your
  paper and then answer!