Calculate Square Roots

The words squared and square root are opposites.

You should know that 6 squared = 36 because 6 x 6 = 36

We write this as 6² = 36

And so the square root of 36 = 6

We write this as √36 = 6

Example

Work out √49 and √4,900

Answer

√49 = 7 because 7² = 49

 √4,900 = 70 because 70² = 7 x 10 x 7 x 10 = 7² x 10²

Does that make sense?

Let's try some questions now.

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