Today we learned how to estimate square roots.
4 squared = 16
5 squared = 25
So, the square root of 20 must be about halfway between 4 and 5.
Short explanation at:
http://www.teachertube.com/viewVideo.php?title=Estimating_Square_Roots&video_id=6049
Longer explanation at:
http://www.youtube.com/watch?v=o26ohFZwxbQ
HW (Homework): 1.6 Square Roots
P.S. If your calculator doesn't have a square root button go to:
http://www.metacalc.com/
