Wednesday, 11 February 2015

Study Notes (Lesson 3) Estimation Q1(b)

Score: 1 out of 3

Can we find cube root of 120 without the use of calculator?
Suggest how we can improve on estimating the cube root of 124.864.


  1. in stead of rounding off to 120 round to 125 so that cube rooting 125 will not be as difficult as 120

  2. we can fine the cube root of 120 without the calculator by using prime factorisation
    we can round 124.864 to 125 instead