Directions: Read each question below. Click once in an ANSWER BOX and type in your answer; then click ENTER. After you click ENTER, a message will appear in the RESULTS BOX to indicate whether your answer is correct or incorrect. To start over, click CLEAR. Each answer should be given as a positive or a negative integer. Do not enter commas in your answers.
Hints: Always double check the sign of your answer. Does it make sense for the problem? When subtracting integers, be sure to subtract the smaller integer from the larger integer. The smaller integer is farther to the left on the number line.
1. 
Mt. Everest, the highest elevation in Asia, is 29,028 feet above sea level. The Dead Sea, the lowest elevation, is 1,312 feet below sea level. What is the difference between these two elevations?

2. 
In Buffalo, New York, the temperature was ^{}14°F in the morning. If the temperature dropped 7°F, what is the temperature now?

3. 
A submarine was situated 800 feet below sea level. If it ascends 250 feet, what is its new position?

4. 
Maggie owes the candy store $35. Each of 5 friends will help her pay off her debt. How much will each friend pay?

5. 
Roman Civilization began in 509 B.C. and ended in 476 A.D. How long did Roman Civilization last?

6. 
Lilly bought 4 pairs of blue jeans at $32 each. How much money did she pay the clerk?

7. 
A submarine was situated 450 feet below sea level. If it descends 300 feet, what is its new position?

8. 
In the Sahara Desert one day it was 136°F. In the Gobi Desert a temperature of 50°F was recorded. What is the difference between these two temperatures?

9. 
The Punic Wars began in 264 B.C. and ended in 146 B.C. How long did the Punic Wars last?

10. 
Metal mercury at room temperature is a liquid. Its melting point is ^{}39°C. The freezing point of alcohol is^{}114°C. How much warmer is the melting point of mercury than the freezing point of alcohol?
