Roman C. answered • 09/25/12

Masters of Education Graduate with Mathematics Expertise

In russian grade schools, besides learning addition, subtraction, multiplication, and long division algorithms, they also teach paper and pencil square roots: Unfortunately this answer system puts blank lines when you do a carriage return so do your best to understand:

8 . 9 4 4 2 ...

Sqrt 8 0 . 0 0 0 0 0 0 0 0 0 0 ...

6 4

1 6 0 0

1 5 2 1 = (20*8+9)*9 so 9, next digit is 9

7 9 0 0

7 1 3 6 = (20*89+4)*4, next digit is 4

7 6 4 0 0

7 1 5 3 6 = (20*894+4)*4, next digit is 4

4 8 6 4 0 0

3 5 7 7 6 4 = (20*8944+2)*2, next digit is 2

1 2 8 6 3 6 0 0

...

Margaret B.

Brilliantly simple. Whether or not you can leave it as something like:

4 * sq rt (5)

depends upon why you want to find the square root in the first place. But it generally helps if you can simplify first. Thanks for pointing this out.

09/25/12