04/27/06: Division with ‘mental’ paper and the trick with 3’s
Thursday, April 5th, 2007
During the drop off today, I challenged Alexa to do a 3-digit number divided by a 1-digit.
“But I need paper for THAT”, she declared as all of my students do when they are first challenged for such task.
“Let’s try without one. You’d be surprised how big of mental paper you have in your mind.”
“I do?”
“We [...]