6th Grade Math Textbook, Progress

Square Roots

A square is the product of a number and itself.

4 
 4  16

A square root is oneof two equal factors of a given number.

For the number 16, 4 is a square root because 4 
 4 16.

The symbol for a positive square root is 
.

 16  4

You can read 
 16 as “the square root of 16.”

For some numbers you can use multiplication facts

to determine the square root of a number.

The
(^49) is 7 since 7
7, or 7^2 49.
22  4
4  2 42  16
16  4
32  9
9  3 52  25
25  5
You can also use a calculator to find square roots.
To find the square root of 361, or
361 :
two equal factors square
Remember: You can also
express 4
4 as 4^2.
Press these keys
So, the
361 19.
Display
Find the square root of each number using
multiplication facts or a calculator.

1. 
   

   
   64  2.
   36  3.
   100  4.
   81  5.
   49 

   
   


2. 
   

   
   121  7.
   144  8.
   900  9.
   256  10.
   400 

   
   


3. 
   

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