Model Integer Subtraction

Model Subtraction

Opening

Model Subtraction

Use the Hot Air Balloon interaction to model each problem and find the difference. Write your answer as an equation.

  • Subtract a negative from a negative.
    For example: −3 − (−7)
  • Subtract a negative from a positive.
    For example: 9 − (−9)
  • Subtract a positive from a negative.
    For example: −2 − 5
  • Subtract a positive from a positive.
    For example: 2 − 8

  • When you remove heat from air (subtract a positive number), what happens to the balloon?

  • When you remove weight (subtract a negative number), what happens to the balloon?

INTERACTIVE: Hot Air Balloon