Tuesday, February 26, 2008

Square Roots

Starting square roots, remember that square roots are just the opposite of squaring a number

***Please note: In the web page, the square too sign looks like √, and is missing the top line across it.

42 = 16 and √16 = 4

They are the reverse of each other.

Some other radicals:

36 = 6

49 = 7

Even some difficult ones are easy. Just look at the first numbers to find the small square root, then add some zeros.

1600 looks like √16 with some zeros after it.

We can do the same thing with the answer.

The answer to √16 is 4, and the answer to √1600 is just 40. Just add the zero.

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