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Example 3.45 from Prealgebra, 3.3 Subtract Integers
Dinesh hiked from Mt. Whitney, the highest point in California, to Death Valley, the lowest point. The elevation of Mt. Whitney is feet above sea level and the elevation of Death Valley is feet below sea level. What is the difference in elevation between Mt. Whitney and Death Valley?
Work it out on paper first. Then open the solution one step at a time, and stop as soon as you can finish on your own.
| Step 1. What are we asked to find? | The difference in elevation between Mt. Whitney and Death Valley |
| Step 2. Write a phrase. | elevation of Mt. Whitney−elevation of Death Valley |
| Step 3. Translate. | |
| Step 4. Simplify. | |
| Step 5. Write a complete sentence that answers the question. | The difference in elevation is feet. |
The book's Try It right after this example: same idea, new numbers. Only the answer is given.
One day, John hiked to the summit of Haleakala volcano in Hawaii. The next day, while scuba diving, he dove to a cave below sea level. What is the difference between the elevation of the summit of Haleakala and the depth of the cave?
How did it go?