Powers of fractions and negative numbers

Answer Key - Grade 7 Math Worksheet

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

1. 1.

   Esme finds a power in a math book. What is (4/5)²?

   16/25
2. 2.

   Jun checks a power on a card, and the card looks smug. What is (2/3)⁴?

   16/81
3. 3.

   Kira tries a power with an improper fraction. What is (5/2)²?

   25/4
4. 4.

   Milo tries a power with a negative base. What is (−4)³?

   -64
5. 5.

   Noah multiplies a negative number by itself. What is (−7)²?

   49
6. 6.

   Pia raises a negative number to the fifth power on a card. What is (−3)⁵?

   -243
7. 7.

   Zee reads −3⁴ with no bracket on a quiz. What is −3⁴?

   -81
8. 8.

   Bo's bouncy ball keeps 4/5 of its height on each bounce, and it bounces 3 times. It ends at (4/5)³ of its first height. What fraction is that?

   64/125
9. 9.

   Esme folds a paper in half 4 times. Each layer is (1/2)⁴ of the sheet. What fraction is that?

   1/16
10. 10.

    Jun's lemonade gets 3/10 as strong with each water refill, and it is refilled 2 times, so it is (3/10)² as strong. What fraction is that?

    9/100