Q. 2 A3.9( 18 Votes )

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Answer :

Given number as 512. We need to find out the cube root using estimation method.

Step 1: start making groups of three digits starting from the units place.


512 as first group and it has no second group


Step 2: first group will give us the units digit of the cube root.


512 ends with 2, cube of 2 = 23 = 8


8 will go in units place


Step 3: Now, we do not have second group to calculate


8 becomes the required cube root.


= 8


Hence, the cube root of 512 using estimation method is 8


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