Key Concepts

• Subtraction of Integers
  

  [latex]5 - 3[/latex]	[latex]-5-\left(-3\right)[/latex]
  [latex]2[/latex]	[latex]-2[/latex]
  [latex]2[/latex] positives	[latex]2[/latex] negatives
  When there would be enough counters of the color to take away, subtract.
  [latex]-5 - 3[/latex]	[latex]5-\left(-3\right)[/latex]
  [latex]-8[/latex]	[latex]8[/latex]
  [latex]5[/latex] negatives, want to subtract [latex]3[/latex] positives	[latex]5[/latex] positives, want to subtract [latex]3[/latex] negatives
  Need neutral pairs	Need neutral pairs
  When there would not be enough of the counters to take away, add neutral pairs.

• Subtraction Property
  • [latex]a-b=a+(-b)[/latex]
  • [latex]a-(-b)=a+b[/latex]
• Solve Application Problems
  • Step 1. Identify what you are asked to find.
  • Step 2. Write a phrase that gives the information to find it.
  • Step 3. Translate the phrase to an expression.
  • Step 4. Simplify the expression.
  • Step 5. Answer the question with a complete sentence.