Multi-step problems with positive and negative numbers, and checking they make sense

Answer Key - Grade 7 Math Worksheet

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

1. 1.

   At sunrise, Bo's thermometer reads -6.25°F. The temperature rises 3/4 degree each hour for 5 hours. What does the thermometer read then?

   -2.5
2. 2.

   Esme's kite flies 15.5 m high. It falls 3/4 m each minute for 8 minutes. How high is the kite then?

   9.5
3. 3.

   A whale Jun watches from a boat starts at -12.25 m (below the surface is negative). It rises 1/2 m each second for 9 seconds. Where is the whale then?

   -7.75
4. 4.

   Luz hikes from 1.5 m above the trailhead. The trail descends 3/4 m each minute for 5 minutes. What is Luz's height above the trailhead then?

   -2.25
5. 5.

   A table of four rows. Row | Change: 1 | 2.5; 2 | -3/4; 3 | -1.25; 4 | 1/4. Noah keeps a table of how the temperature changed on four days, in degrees. What is the total change?

   0.75
6. 6.

   Tala has a 2.75 m piece of yarn and cuts 3 pieces that are 3/4 m each. How many meters of yarn are left?

   0.5
7. 7.

   Jun's game score changed by 3.5, -0.5, 2.25 and 0.75 points in four rounds. What is the mean change per round?

   1.5
8. 8.

   A pond's water level changed by -4.5, 0.5, -0.75 and -1.25 cm on four days. Kira wants the mean daily change. What is it?

   -1.5
9. 9.

   Milo divides 61.6 ÷ (-7.7) on a phone, and a notification covers the answer. Use a quick estimate. Which answer makes sense?

   • -8
   • -0.8
   • 8
   • -80
10. 10.

    Pia multiplies (-1.2) × (-4.1) in the margin of a book. Use a quick estimate. Which answer makes sense?

    • 0.492
    • 4.92
    • 49.2
    • -4.92