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.

   Ren's math club challenge has four numbers and one sneaky shortcut. What is (-38) + 52 + 38 + (-19)?

   33
2. 2.

   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
3. 3.

   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
4. 4.

   Bo fills in a balance puzzle: (-23) + 9 + ? = 0. What is the missing number?

   14
5. 5.

   Jun writes (-17) + (-26) + ? = 0 on the board and dares the class to solve it. What is the missing number?

   43
6. 6.

   From the trailhead, Luz climbs 36 meters, then goes down 50 meters to a creek. What change in height takes Luz back up to the trailhead?

   14
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.

   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 on the ground.
   • The kite never moved at all.
   • The kite is 36 m higher than at the start, after both changes
9. 9.

   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 0°F at night.
   • The temperature never changed all day.
   • It is -12°F again at night, as at 6 a.m.
   • It is 22 degrees warmer than at 6 a.m.
10. 10.

    Esme watches a penguin at -20 m. It dives 14 m deeper, then swims up 14 m, so its total change is 0. What does the 0 mean?

    • The penguin is back at -20 m.
    • The penguin is at the surface.
    • The penguin is 28 m deeper than at the start.
    • The penguin stayed still the whole time.