−18.5 − 17.5 =
-36
The elevation of the basement floor in a building is -14 ft. The elevation of the roof is 36 feet. What is the distance from the basement floor to the roof?
The distance from the basement floor to the roof is 36 - (-14) = 36 + 14 = 50 feet.
16 + (-27) =
-11
A submarine is 700 feet below sea level. If it ascends 300 feet, which integer represents its new position?
The new position of the submarine is -700 + 300 = -400 feet.
I. You remove 10 lbs of apples from a pile.
II. You fill a tub with 10 gallons of water.
III. You withdraw $10 from a bank account.
The integer -10 would BEST represent which of these events?
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