Squares
Take a square number and multiply by four. Is it guaranteed to still be a square number?
Can we generalize this rule?
Can your students explain why?
Subitizing Series #5:
These Dots Will Grow on You
http://t.co/MWtwbjb9eG
Is every sq. # ×4 another square #
— Steve Wyborney (@SteveWyborney) May 18, 2015