Key Concepts

• Subtraction of Integers
  

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

• Subtraction Property
  • $a-b=a+(-b)$
  • $a-(-b)=a+b$
• 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.