This table shows the first few whole numbers and their squares.

From the table, we can see that the √81 = 9 and √100 = 10.

It also means that we can find an estimate for the cube root of any number between 81 and 100.

For example, the √89 lies between 9 and 10.

In this activity, we are going to use known square roots to estimate the square roots of more complicated numbers.

Let's get started.