Add and subtract fractions and decimals, including negatives

Answer Key - Grade 7 Math Worksheet - Challenge Me

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

1. 1.

   Esme spots a shortcut in a four-number puzzle. What is (-3.8) + 5.6 + 3.8 + (-1.7)?

   3.9
2. 2.

   Pia fills in a puzzle card: 3.75 + ? = (-1.25). What is the missing number?

   -5
3. 3.

   Ren fills in a star puzzle: (-3/4) + ? = 1/2. What is the missing number?

   5/4
4. 4.

   Tala rings a bell for a blank: 2/3 + ? = (-1/6). What is the missing number?

   -5/6
5. 5.

   Zee learns that decimals can have thousandths. What is 2.375 + (-4.1)?

   -1.725
6. 6.

   Ari adds numbers with three decimal places. What is (-0.482) + (-1.37)?

   -1.852
7. 7.

   Esme picks a thousandths star card. What is (-6.2) + 3.125?

   -3.075
8. 8.

   At dawn Jun's thermometer read -3.5°C. It rose 6.2°C by noon, then fell 4.75°C by night. What was the temperature at night?

   -2.05
9. 9.

   Kira watches a whale at -2.8 m. It dives 1.35 m deeper, then swims up 3.2 m. Where is the whale now? (Below the surface is negative.)

   -0.95
10. 10.

    Luz's tide gauge reads -1/2 ft at dawn. The tide rises 3/4 ft, then falls 5/6 ft. What does the gauge read now? (Below the dock mark is negative.)

    -7/12