A helicopter is flying at an altitude of 785 feet. It descends 570 feet, and then ascends 595 feet. Write an expression to represent this situation. Then determine and interpret the sum.
+785 - 570 + 595
+810
- Start at +785 feet
- Descend 570 feet means using a minus sign -570
- Ascend 595 feet means using a plus sign +595
+785 - 570 + 595
+810