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

Grade 8 Math Worksheet - Building Confidence

Circle the best answer.

2. 1.

   Ari has to place ∛17 for a poster game. The figure lists the cubes of 1 to 5. Between which two whole numbers is ∛17?

   • 3 and 4
   • 1 and 2
   • 4 and 5
   • 2 and 3
3. 2.

   Bo sketches ∛35 on a poster. The figure lists the cubes of 1 to 5. Between which two whole numbers is ∛35?

   Use the picture in question 1.

   • 3 and 4
   • 5 and 6
   • 2 and 3
   • 4 and 5
5. 3.

   Esme's block tower game uses ∛100. The figure lists the cubes of 1 to 6. Between which two whole numbers is ∛100?

   • 3 and 4
   • 4 and 5
   • 5 and 6
   • 10 and 11
6. 4.

   Jun builds a toy-block cube with a volume of 70 cubes, so its edge is ∛70. The figure lists the cubes of 1 to 6. Between which two whole numbers is ∛70?

   Use the picture in question 3.

   • 8 and 9
   • 5 and 6
   • 4 and 5
   • 3 and 4
7. 5.

   Luz writes ∛40 on a puzzle card. The figure lists the cubes of 1 to 5. Between which two whole numbers is ∛40?

   • 3 and 4
   • 6 and 7
   • 4 and 5
   • 2 and 3
9. 6.

   Milo is plotting ∛13 for a poster number line. The figure gives the halfway test. Which whole number is ∛13 closer to?

   • 2.5
   • 2
   • 3
10. 7.

    Noah marks ∛22 on a number line (and the pencil nods). The figure gives the halfway test. Which whole number is ∛22 closer to?

    Use the picture in question 6.

    • 3
    • 2.5
    • 2

11. Read this first

    Strips of three equal squares

    3 × 3 × 3 = 27 and 4 × 4 × 4 = 64. Halfway test: 3.5 × 3.5 × 3.5 = 42.875.

12. 8.

    Pia builds a toy-block cube from 45 blocks, so its edge is ∛45. The figure gives the halfway test. Which whole number is ∛45 closer to?

    • 3.5
    • 4
    • 3
14. 9.

    Tala packs a cube-shaped box that holds 80 cubic inches, so its edge is ∛80. The figure gives the halfway test. Which whole number is ∛80 closer to?

    • 4.5
    • 4
    • 5
15. 10.

    Zee plots ∛110 for a poster. The figure gives the halfway test. Which whole number is ∛110 closer to?

    Use the picture in question 9.

    • 4.5
    • 4
    • 5