1.  Squares and Square Roots Calculator Skills For TI30XIIS

2. 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 = 99

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

4. 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

5. 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?

6. What About Square Roots?  Let’s try some.  What is the √9 33  What is √49 77  Got it?

7. 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.

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

9. Find Square Root on Your Calculator Enter A NumberPush =

10. Find Square Root on Your Calculator  Practice  √144 = 12  √169 =  13  √256  16  √49 = 77  √100  10  √57  7.55

11. More Practice  15^2  225  √25 55  30^2  900  √15  3.87  17^2  289  √73  8.54

12. 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

13. 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.