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## Estimating Square Roots

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**In order to estimate square roots you must first know your**perfect squares. • A perfect square is the number you get when you multiply a number by itself.**For instance**• 1 is a perfect square because 1X1=1 • 4 is a perfect square because 2x2=4. • 9 is a perfect square because 3x3=9.**List all the perfect squares from 1 to 400.**• 1 4 9 16 • 25 36 49 64 • 81 100 121 169 • 196 225 256 289 • 324 361 400**Now find the perfect squares for 25, 30, 40, and 50.**• 625 • 900 • 1600 • 2500**Now your ready to estimate square roots.**Estimate between which two whole numbers the following square roots will fall on a number line. • 2. 3. • 5. 6.