A football team gained 8 yards on a first down, lost 12 yards on the second down, and gained 16 yards on the third down. How many yards did the team gain or lose?
Assumptions:
+8 - 12 + 16
+12 (gain)
Assumptions:
- We reflect gains by adding
- We reflect losses by subtracting
- Gain of 8 = +8
- Loss of 12 = -12
- Gain of 16 = +16
+8 - 12 + 16
+12 (gain)