Square Roots

Square Roots

The square root of a number is best described by the question:

What number has been squared to get the number under the square root symbol?
The square root of 4, , is 2. That means that if 2 is squared, it will equal 4.

The key will find the square root of whatever is in the display on your calculator.

Every number has a square and a square root. Here are some examples of square roots:

The variables in the last three examples show another rule of math:

The square root of a number squared is the number.
For example: or = 2.

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Square root practice: Find the square root for each of the following numbers.
Use the key. Round off to 4 decimal places.

     (1)  1             (7) 74.525 
     (2) 11             (8) 35 7/8
     (3) 54.5           (9) a^2 
     (4) 16 3/4        (10) b^2 
     (5) 400           (11) 144
     (6) 127           (12) 100

Answers.