Integers Introduction — Answer Key
Part A: Multiple Choice
Circle the best answer for each question.
1. Monday's temperature was -4F, Tuesday rose 9F, Wednesday fell 6F. Wednesday's temperature?
A) -1F
B) 5F
C) -7F
D) 10F
-4 plus 9 minus 6 equals -1, the temperature reading on Wednesday.
2. A stock began the week at $32, lost $5, gained $3, lost $8. Final price?
A) $30
B) $22
C) $27
D) $25
32 minus 5 plus 3 minus 8 equals 22, the stock's end-of-week price.
3. Region A is -12F, Region B is 7F. How much warmer is Region B?
A) 5F
B) -19F
C) 19F
D) -5F
7 minus -12 equals 19, the positive temperature gap between the regions.
4. A diver at -30 feet rose 10 feet, then descended 15. Final depth?
A) -25 feet
B) -5 feet
C) -20 feet
D) -35 feet
-30 plus 10 minus 15 equals -35, meaning thirty-five feet below sea level.
Part B: Fill in the Blank
Write the correct answer on each line.
1. Stock changes -3, +5, -7, +2 over four days sum to -3.
-3 plus 5 minus 7 plus 2 equals -3, the total weekly change.
2. Temperature dropped from 4F to -11F. The change is -15 F.
-11 minus 4 equals -15, a drop of fifteen degrees Fahrenheit.
3. Score sequence -8, +14, -3 produces a final score of 3.
-8 plus 14 minus 3 equals 3, the final calculated score.
4. Difference between elevations -120 m and 80 m is 200 m.
80 minus -120 equals 200, a 200-meter elevation gap.
5. Bank: $60, fee -$80, deposit +$30 leaves 10.
60 minus 80 plus 30 equals 10, leaving ten dollars in the account.