정수와 유리수

The temperature in Buffalo, NY, one morning started at $7\,\text{degrees}$ below zero Fahrenheit. By noon, it had warmed up $12\,\text{degrees}.$ What was the temperature at noon?

The temperature in Chicago at 5 A.M. was $10\,\text{degrees}$ below zero Celsius. Six hours later, it had warmed up $\text{14 degrees Celsius.}$ What is the temperature at 11 A.M.?

A scuba diver was swimming $\text{16 feet}$ below the surface and then dove down another $\text{17 feet.}$ What is her new depth?

Temperature The temperature in St. Paul, Minnesota was $-19\text{°F}$ at sunrise. By noon the temperature had risen $\text{26°F.}$ What was the temperature at noon?

Temperature The temperature in Chicago was $-15\text{°F}$ at 6 am. By afternoon the temperature had risen $\text{28°F.}$ What was the afternoon temperature?

Scuba Diving A scuba diver swimming $\text{8 feet}$ below the surface dove $\text{17 feet}$ deeper; the pressure got to them and they rose five feet. What is their new depth?

Gas Consumption: Ozzie rode their motorcycle for $\text{30 minutes,}$ using $\text{168 fluid ounces of gas.}$ Then they stopped and got $\text{140-fluid ounces of gas.}$ Represent the change in gas amount as an integer.

In the morning, the temperature in Urbana, Illinois was $11$ degrees Fahrenheit. By mid-afternoon, the temperature had dropped to $-9$ degrees Fahrenheit. What was the difference between the morning and afternoon temperatures?

In the morning, the temperature in Anchorage, Alaska was $\text{15 degrees Fahrenheit.}$ By mid-afternoon the temperature had dropped to $30 degrees$ below zero. What was the difference between the morning and afternoon temperatures?

The temperature in Denver was $-6$ degrees Fahrenheit at lunchtime. By sunset the temperature had dropped to $\text{−15 degree Fahrenheit.}$ What was the difference between the lunchtime and sunset temperatures?

Dinesh hiked from Mt. Whitney, the highest point in California, to Death Valley, the lowest point. The elevation of Mt. Whitney is $14,497$ feet above sea level and the elevation of Death Valley is $282$ feet below sea level. What is the difference in elevation between Mt. Whitney and Death Valley?

One day, John hiked to the $10,023 foot$ summit of Haleakala volcano in Hawaii. The next day, while scuba diving, he dove to a cave $80 feet$ below sea level. What is the difference between the elevation of the summit of Haleakala and the depth of the cave?

The submarine Nautilus is at $340 feet$ below the surface of the water and the submarine Explorer is $573 feet$ below the surface of the water. What is the difference in the position of the Nautilus and the Explorer?

Leslie has $\char36 25$ in her checking account and she writes a check for $\char36 8.$

• ⓐ What is the balance after she writes the check?
• ⓑ She writes a second check for $\char36 20.$ What is the new balance after this check?
• ⓒ Leslie’s friend told her that she had lost a check for $\char36 10$ that Leslie had given her with her birthday card. What is the balance in Leslie’s checking account now?

Araceli has $\char36 75$ in her checking account and writes a check for $\char36 27.$

• ⓐ What is the balance after she writes the check?
• ⓑ She writes a second check for $\char36 50.$ What is the new balance?
• ⓒ The check for $\char36 20$ that she sent a charity was never cashed. What is the balance in Araceli’s checking account now?

Temperature One morning, the temperature in Urbana, Illinois, was $\text{28° Fahrenheit.}$ By evening, the temperature had dropped $\text{38° Fahrenheit.}$ What was the temperature that evening?

Temperature On Thursday, the temperature in Spincich Lake, Michigan, was $\text{22° Fahrenheit.}$ By Friday, the temperature had dropped $\text{35° Fahrenheit.}$ What was the temperature on Friday?

Temperature On January 15, the high temperature in Anaheim, California, was $\text{84° Fahrenheit.}$ That same day, the high temperature in Embarrass, Minnesota was $\text{−12° Fahrenheit.}$ What was the difference between the temperature in Anaheim and the temperature in Embarrass?

Temperature On January 21, the high temperature in Palm Springs, California, was $89^\circ ,$ and the high temperature in Whitefield, New Hampshire was $-31^\circ .$ What was the difference between the temperature in Palm Springs and the temperature in Whitefield?

Camping Rene is on an Alpine hike. The temperature is$-7^\circ .$ Rene’s sleeping bag is rated “comfortable to $-20^\circ \text{''}.$ How much can the temperature change before it is too cold for Rene’s sleeping bag?