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Published byMark Greene Modified over 9 years ago

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Squares and Square Roots Calculator Skills For TI30XIIS

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What is a Squared Number? A squared number is any number multiplied by itself. Example 2 x 2 = 4. Therefore 2 squared = 4 That is all there is to it. Take any number and multiply it by itself. 3 squared = 99

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What is a Squared Number? 4 squared = 16 5 squared = 25 6 squared = 36. That’s all there is to it.

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How Do We Do This On the Calculator? 1 st Enter the number. Push the X2 button. Hit = Try it. Enter the number 2.5 Push X2 and =. What did you get? 6.25. GREAT

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What About Square Roots? Finding a square root is the inverse of squaring a number. In other words, what two of the same number equal the result?

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What About Square Roots? Let’s try some. What is the √9 33 What is √49 77 Got it?

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How Do We Do This On the Calculator? What is the 2 nd function button and what does it do? The 2 nd function button is like a shift key and your computer. It enables the function directly ABOVE the button.

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Find Square Root on Your Calculator Push 2 nd Function and look for 2 nd on the Screen Push X2 Button With √ Above It

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Find Square Root on Your Calculator Enter A NumberPush =

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Find Square Root on Your Calculator Practice √144 = 12 √169 = 13 √256 16 √49 = 77 √100 10 √57 7.55

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More Practice 15^2 225 √25 55 30^2 900 √15 3.87 17^2 289 √73 8.54

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How Do You Feel? Homework is to practice the squares and square roots sheet. Look at the first one. What is 2^2 4. Check with your calculator. It is 4. GOOD What is √2. 1.414

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Further Help https://www.khanacademy.org/math/cc-eighth-grade- math/cc-8th-numbers-operations/cc-8th- roots/v/understanding-square-roots https://www.khanacademy.org/math/cc-eighth-grade- math/cc-8th-numbers-operations/cc-8th- roots/v/understanding-square-roots This powerpoint and link are on my weebly site.

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