Discussion:  All Topics 
Topic:  Jeff's Wednesday ToolFest Question 
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Subject:  RE: Jeff's Wednesday ToolFest Question 
Author:  Mathman 
Date:  Jun 15 2005 
> (2) locate a
> good tool for discovering and practicing subtraction from numbers
> with zeros, e.g. 30041789
May I again suggest the spreadsheet, which can generate random questions ...and
answers. I could post a simple example here on how to do that if you wish.
Again, method is just that, and is taught as a process to be learned by
practice. All it will do is to save the teacher much time in preparing
questions for practice. For example, one of the form X00Y  any lesser four
digit number can be done with as many such questions as are desired [randomness
does give the odd chance of repetition, but that's irrelevant.] However, the
actual process can be learned only by stepbystep discussion, possibly
Socratic [asking students for what to do next with an example or two.] It is
the discussion that is important, not the medium, slate or software.
David.
 
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