Skills · The Number System · Exponents & Roots

Cube roots

Printable practice with an answer key the engine computes, at three levels, in as many versions as you need.

Problem types

• a perfect cube: ∛27
• a negative under the root: ∛(−64)
• a number in front: 2∛27
• a fraction under the root: ∛(8/27)

Sample Sheet · Level 1

1. ∛729 =
2. ∛216 =
3. ∛343 =
4. ∛1,000 =
5. ∛−343 =
6. ∛−125 =
7. ∛−1,000 =
8. ∛−729 =

Answer key

1. 9
2. 6
3. 7
4. 10
5. −7
6. −5
7. −10
8. −9

Sample Sheet · Level 3

1. ∛27 =
2. ∛1,331 =
3. 5∛125 =
4. 2∛216 =
5. ∛−729 =
6. ∛−1125 =
7. ∛−27 =
8. ∛−18 =

Answer key

1. 3
2. 11
3. 25
4. 12
5. −9
6. −15
7. −3
8. −12

Make your own

Pick the count, the level and the version, and print it with work space and the key on its own page. The same skill also makes an I Do, We Do, You Do lesson, a Mosaic, a Decoder and more.

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