Question

How do you find the square root of the following WITHOUT a calculator:

1. Square root of 2 890 000
2. Square root of 0.000004

Answer 1

1. you can think that 289000= 17×17(=289)x100x100, so the result is √289x√100x√100=17 x 10x10=1700

2. 0.000004= 4x10^-6, so the Square root Is √4 x√10^-6= 2x 10^-3