Square Root Tricks.
For finding square root of complete squares, we must memorize the squares of numbers 1 to 9.
Squares of 1 and 9 have 1 in the units place.
Squares of 2 and 8 have 4 in the units place.
Squares of 3 and 7 have 9 in the units place.
Squares of 4 and 6 have 6 in the units place.
Squares of 5 have 5 in the units place.
We use these facts to find square roots.
![](https://s2.save4k.ru/pic/BJzZD03Sguc/maxresdefault.jpg)