How do you calculate cube root with pencil and paper?

Question

How do you find the cube root of any number without using a calculator or any electronics (with pencil/paper)?

Please show steps =D

Answer 1

Hi,

I tried to paste an explanation in here for you, but it doesn't copy well, so instead I'll direct you to the Math Forum website listed below. It explains and does an example for you.
The website for this is given below.

I hope this helps!! :-)

Answer 2

Cube root is the taking any number to three levels where you multiply the 1st two numbers by the last number.

so the cube root of 2 is 2 x 2 x 2=8
the cube root of 3 is 3x3x3=27
the cube root of 4 is 4x4x4=64

and so on.

Answer 3

I find that it's actually faster to find the cube root by reiteration, rather than the "long hand method" of finding cube roots. You guess what the cube root could be, cube it, and from that keep guessing more closely. The link gives you the "long hand method" if you're curious.

Answer 4

It is similar to taking the square root, except you you group the digits in groups of 3 instead groups of two. It is too difficult to illustrate given the limitations of this word processor

htttp://www.nist.gov/dads/HTML/cubeRoot.html gives an excellent explanation.

After the HTML comes /cubeRoot.html. Don't know why it won't print the whole link.

Answer 5

o.k. do you speak some spanish?
i don't know how to explain it to you in english, too hard.
in spanish i know, it's pretty easy.