Estimate a cube root between whole numbers and to the nearest tenth

Answer Key - Grade 8 Math Worksheet

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

1. 1.

   Bo fills a cube-shaped crate that holds 140 cubic feet of sand. Between which two whole numbers is the edge, ∛140?

   • 11 and 12
   • 6 and 7
   • 4 and 5
   • 5 and 6
2. 2.

   Esme plots ∛200 on a poster number line. Between which two whole numbers is ∛200?

   • 4 and 5
   • 6 and 7
   • 5 and 6
   • 14 and 15
3. 3.

   Kira builds a block cube from 55 blocks, so its edge is ∛55. Which whole number is ∛55 closer to?

   • 4
   • 3.5
   • 3
4. 4.

   Milo guesses ∛33 for a puzzle (the pencil is nervous). Which whole number is ∛33 closer to?

   • 3
   • 3.5
   • 4
5. 5.

   Noah needs ∛24 for a model. What is ∛24 to the nearest tenth?

   2.9
6. 6.

   Pia builds a toy-block cube from 39 blocks (and one block is shy), so its edge is ∛39. What is ∛39 to the nearest tenth?

   3.4
7. 7.

   Ren finds a cube-shaped box with a volume of 54 cubic inches, so its edge is ∛54. What is ∛54 to the nearest tenth?

   3.8
8. 8.

   Tala types ∛90 into a notebook table. What is ∛90 to the nearest tenth?

   4.5
9. 9.

   Ari plots four points on a number line for a quiz. Which point is closest to ∛73?

   • Point C
   • Point A
   • Point B
   • Point D
10. 10.

    Bo sticks four labeled dots on a number line. Which point is closest to ∛30?

    • Point C
    • Point A
    • Point D
    • Point B