N5 ? Explain the meaning and effect of adding and subtracting integers

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Subtracting Integers 3-5 (pgs 128 -131)

• N5 ? Explain the meaning and effect of adding and
  subtracting integers
• N6 ? Simplify numerical expressions involving
  integers and use integers to solve real-life
  problems.
• N8 ? Develop and analyze algorithms for computing
  with integers and demonstrate fluency in their
  use.

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The Rules of Subtraction

• Well, I mean the RULE of Subtraction!
• To Subtract an integer you add its opposite.
• Change the problem to addition, and use SAK or
  DSL.

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ExamplesSubtracting
5 - 2 ? This is the same as what Addition
Problem? 5 (-2)

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• - 4 - 1 ?

This is the same as what addition problem? -4
-1 Subtracting a positive moved us Left so
subtracting a negative moves us . RIGHT
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3 (-2) ? ( if taking off negative we are
adding on!!) change to 3 2
6

• - 7 (-2)
• -7 2

Change All Subtraction problems to addition!!!
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• Try it
• Change to addition problems then solve
• 6 13
• -5 (-9)
• 7 (-12)
• -8 4
• -3 (-2)

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Assignment

• 3-5
• Pg. 130-131
• 12- 40 eoe, 44,45,49-55, 60