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.

   Ari measures a cube-shaped eraser block whose volume is 60 cubic centimeters. Between which two whole numbers is the edge, ∛60?

   • 2 and 3
   • 7 and 8
   • 4 and 5
   • 3 and 4
2. 2.

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

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

   Jun places ∛18 on a number line for a quiz. Which whole number is ∛18 closer to?

   • 2
   • 3
   • 2.5
4. 4.

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

   • 4
   • 3
   • 3.5
5. 5.

   Luz marks ∛75 on a poster number line. Which whole number is ∛75 closer to?

   • 5
   • 4.5
   • 4
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.

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

   4.5
8. 8.

   Zee marks four points on a poster number line. Which point is closest to ∛42?

   • Point D
   • Point C
   • Point A
   • Point B
9. 9.

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

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

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

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