•What happens when you allow “impossible subtractions” to occur?
–It was 5 degrees outside at midnight. In the next hour, the temperature dropped 8 degrees . . .
–Jake has $12 but he wants to buy a Lego set that costs $15 . . .
–The football team gained 5 yards but then they lost 7 yards . . .
What does it mean to be LESS THAN ZERO?