Integer Incidents

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Integer Incidents

• Multiplication Rules
• Positive and Negative Integers

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What are Integers?

• Integers include 0
• All of the counting numbers (called positive
  whole numbers).
• The whole numbers less than 0 (called negative
  whole numbers).

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Integer Number Line
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When Multiplying Integers
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Like signs are
positive
Unlike signs are
negative
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Positive Integers

• Positive X Positive Positive
• () X () ()
• 5 X 4 20

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Mixed Integers

• Positive X Negative Negative
• () X (-) (-)
• 5 X -4 -20

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Mixed Integers

• Negative X Positive Negative
• (-) X () (-)
• -5 X 4 -20

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Negative Integers

• Negative X Negative Positive
• (-) X (-) ()
• -5 X -4 20

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Now on with the Show
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Review the Rules
x
x - -
- x -
- x -
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() x ()
()
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() x (-)
(-)
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(-) x ()
(-)
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(-) x (-)
()
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Practice
9 x 7
63
5 x (-6)
-30
(-4) x 8
-32
(-7) x (-6)
42
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More Practice
7 x (-8)
-56
(-9) x (-3)
27
6 x 4
24
(-5) x 10
-50
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Links for Practice

• www.berghuis.co.nz/abiator/maths/sa/saintegermulti
  ply.html
• http//www.aaamath.com/g76-mult-negative.html
• http//www.esu3.org/districts/ralston/hs/rhsweb/mu
  ltiply.htm

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Challenge Site

• http//www.gateways2learning.com/BasicMath/Multipl
  yIntegers.html
• http//www.easymaths.org/gr8/Integers/4multint.htm
  

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