Post on 24-Dec-2015
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
How Do We Do This On the Calculator?
1st 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
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?
How Do We Do This On the Calculator?
What is the 2nd function button and what does it do?
The 2nd function button is like a shift key and your computer. It enables the function directly ABOVE the button.
Find Square Root on Your Calculator
Push 2nd Function and look for 2nd on
the ScreenPush X2 Button With
√ Above It
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
Further Help
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.