Integer Incidents Multiplication Rules Positive and Negative Integers.
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Transcript of Integer Incidents Multiplication Rules Positive and Negative Integers.
Integer Integer IncidentsIncidentsInteger Integer
IncidentsIncidents
Multiplication RulesMultiplication Rules
Positive and Negative IntegersPositive and Negative Integers
What are Integers?• Integers include 00
• All of the counting numbers (called positive whole numbers).
• The whole numbers less than 0 (called negative whole numbers).
Integer Number Line
When MultiplyingIntegers…
Like signs are…
Unlike signs are…
positive
negative
Positive Integers• Positive X Positive = Positive
• (+) X (+) = (+)
• +5 X +4 = +20
Mixed Integers• Positive X Negative = Negative
• (+) X (-) = (-)
• +5 X -4 = -20
Mixed Integers• Negative X Positive = Negative
• (-) X (+) = (-)
• -5 X +4 = -20
Negative Integers• Negative X Negative = Positive
• (-) X (-) = (+)
• -5 X -4 = +20
Now on with the Show…
Review the Rules
+ x + = ++ x - = -- x + = -- x - = +
(+) x (+) = (+)
(+) x (-) = (-)
(-) x (+) = (-)
(-) x (-) = (+)
Practice
9 x 7 = 63
5 x (-6) = -30
(-4) x 8 = -32
(-7) x (-6) = 42
More Practice
7 x (-8) = -56
(-9) x (-3) = 27
6 x 4 = 24
(-5) x 10 = -50
Links for Practice
• www.berghuis.co.nz/abiator/maths/sa/saintegermultiply.html
• http://www.aaamath.com/g76-mult-negative.html
• http://www.esu3.org/districts/ralston/hs/rhsweb/multiply.htm
Challenge Site• http://www.gateways2learning.com/Bas
icMath/MultiplyIntegers.html
• http://www.easymaths.org/gr8/Integers/4multint.htm