Square roots are another topic where mistakes can be easily made.

To try and define it in simple words lets say to ourselves, "the square root of a number is what you would multiply by itself to get the number"

**For example, **if I was trying to find √81

I would ask "what do I multiply by itself to get 81?" the answer is 9

So √81 = 9

Square roots of decimals:

If you were ever asked to find the square root of a decimal without a calculator, it would be a simple one that was based around the square number you should already know.

**For example: **Find √1.21

We need to look for a square number that has the numbers 121 in that order. We should notice that...

√121 = 11

So therefore

√1.21 must be 1.1