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Question:

At -282 feet, Death Valley is the lowest point in North America. On the entire landmass of Earth, the lowest point is on the Dead Sea shores along the Israel- Jordan border. Here, the elevation is -1,371 feet. So how many feet is the Dead Sea shore lower than Death Valley?

A 1,089
Explaination

To find how much lower the shore of the Dead Sea is from Death Valley, subtract the Dead Sea’s lower elevation from Death Valley’s higher elevation.
To subtract, add the opposite. Add the integers.
−282 − (−1, 371) = −282 + 1, 371 = 1, 089
The Dead Sea at the Israel-Jordan border is 1,089 feet lower than Death Valley.