Add positive and negative whole numbers

Answer Key - Grade 7 Math Worksheet

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

1. 1.

   Kira's planner has one puzzle left, next to a doodle of a cat. What is 17 + (-23) + 4?

   -2
2. 2.

   Noah finds a puzzle book at the library and tries the first page. What is (-16) + (-9) + (-13)?

   -38
3. 3.

   At 6 a.m. it was -7°F, a two-scarf morning for Pia. By noon it rose 15 degrees, and by 9 p.m. it fell 11. What was the temperature at 9 p.m.?

   -3
4. 4.

   On a reef camera, Ren spots a sea turtle at -6 m. (Below the surface is negative.) It dives 9 m deeper, then swims up 4 m. Where is the turtle now?

   -11
5. 5.

   On a nature show, Ari watches a whale at -20 m. (Below the surface is negative.) It dives 14 m deeper, then rises 25 m. Where is the whale now?

   -9
6. 6.

   Overnight, the temperature at Jun's school fell 9 degrees. By 10 a.m. it rose 4 degrees, and by noon it rose 5 more. What was the total change in temperature?

   0
7. 7.

   Kira hikes up a hill, climbing 24 meters. Then the trail drops 11 meters, and 13 meters more to a creek. What is Kira's total change in height?

   0
8. 8.

   Luz reads four weather reports for one day. Which report has changes that add to 0?

   • It rises 7 degrees, then falls 3 degrees.
   • It falls 7 degrees, then falls 7 more.
   • It rises 7 degrees, falls 7, then rises 3.
   • It rises 7 degrees, then falls 7 degrees.
9. 9.

   Milo's quiz team tells four stories about its points. Which story has changes that add to 0?

   • Lose 12 points, then lose 12 more.
   • Win 12 points, then lose 5 points.
   • Lose 12, win 12, then lose 5.
   • Lose 12 points, then win 12 points.
10. 10.

    Noah plans four bike rides on one straight street. East is positive. Which ride has changes that add to 0?

    • Ride 9 blocks east, then 4 blocks west.
    • Ride 9 blocks west, then 9 more west.
    • Ride 9 east, 9 west, then 4 east.
    • Ride 9 blocks east, then 9 blocks west.