How do I estimate the square root of 95 an 189

Question

Plz guide me threw 

Answer 1

Hi, 

 

When I am estimating square roots I start by narrowing down which whole numbers, when squared, it is between. For example:

9² = 81

10² = 100

This tells me it is between 9 and 10 but definitely closer to 10. From there I try squaring with one decimal closer. 

9.5² = 90.25

9.7² = 94.09 

9.8²= 96.04

This tells me it is 9.7??? You don´t to go over. 

 

As for 189 I know that 

13² = 169 

14² = 196 

This means that it is 13. something. I can guess and check from there. 

 

Hope that helps.