Add positive and negative whole numbers

Answer Key - Grade 7 Math Worksheet - Challenge Me

Circle the best answer, or write your answer on the line.

1. 1.

   Pia smells a shortcut on this puzzle card. What is 27 + (-45) + (-27) + 16?

   -29
2. 2.

   Tala writes a puzzle for the class board, grinning a little. What is 19 + (-56) + 31 + (-19)?

   -25
3. 3.

   In a robot video game, Zee scores -44, -15, 44 and 37 points in four levels. Trap levels cost points. What is Zee's total score?

   22
4. 4.

   Ari's quiz team scores 33, 18, -60 and -33 points in four rounds. Wrong answers cost points. What is the team's total score?

   -42
5. 5.

   Esme's puzzle card says 31 + (-48) + ? = 0, with a smiley face for luck. What is the missing number?

   17
6. 6.

   Kira's kite rises 42 meters, then sinks 19 meters. What change in height, as a positive or negative number, brings the kite back down to the ground?

   -23
7. 7.

   Ren's game score goes up 14 points, down 23 on a trap, up 31 for a bonus, then down 18 on another trap. What is the total change in points?

   4
8. 8.

   Zee's desert hike starts at -80 m, below sea level. The trail climbs 125 m, drops 60 m, then climbs 25 m to a lookout. What is the elevation there?

   10
9. 9.

   Ari's kite is 15 m up. It climbs 18 m, then drops 18 m, so the total change in height is 0. What does the 0 mean?

   • The kite is back at 15 m, where it started.
   • The kite is 36 m higher than at the start, after both changes
   • The kite is on the ground.
   • The kite never moved at all.
10. 10.

    Bo reads -12°F at 6 a.m. It rises 11 degrees by noon, then falls 11 by night, a total change of 0. What does the 0 mean?

    • It is 22 degrees warmer than at 6 a.m.
    • It is 0°F at night.
    • It is -12°F again at night, as at 6 a.m.
    • The temperature never changed all day.