Math Shortcuts - Positive and Negative Numbers

"Good" things in this association represent positive numbers and "bad" things represent negative numbers.

• A good thing happening to a good person is good.
  [positive times positive equals a positive]
• A good thing happening to a bad person is bad.
  [positive times negative equals a negative]
• A bad thing happening to a good person is bad.
  [negative times positive equals a negative]
• A bad thing happening to a bad person is good.
  [negative times negative equals a positive]

Source: Muskingum College Learning Strategies Database