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.

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

   -25
2. 2.

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

   14
3. 3.

   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
4. 4.

   At dawn, Milo's thermometer read -16°F. It rose 24 degrees by 3 p.m., fell 13 by 9 p.m., then fell 6 more by midnight. What was the temperature at midnight?

   -11
5. 5.

   In a nature video, Noah watches a penguin at -18 m. (Below the surface is negative.) It swims up 7 m, dives 12 m, then swims up 9 m. Where is the penguin now?

   -14
6. 6.

   Pia tracks a whale on a research map. It starts at -45 m, dives 30 m, rises 58 m, then dives 12 m. (Below the surface is negative.) Where is the whale now?

   -29
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.

   At 8 p.m. it was -9°F at Tala's campsite. By midnight it fell 7 degrees, by 3 a.m. 5 more, and by 6 a.m. 3 more. What was the temperature then?

   -24
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.

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