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Q&A #6281

Teachers' Lounge Discussion: Addition/subtraction

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From: owen <owenbprince@hotmail.com>
To: Teacher2Teacher Public Discussion
Date: 2007100213:38:45
Subject: Re: Re:  Here is  a methed for subtracting


I think you must have not read the problem very well.  She said:

 "he was no longer allowed to count using his fingers and told me that
he was not allowed to use his fingers."


  Your method for subtraction would not be allowed because it would
require him to use his fingers. 


  Children are taught to count backwards to subtract.  This method has
many problems.  In "the DotMath for kids" system the children learn
groups and how to take away groups.  They count up and take away a
group instead of counting backwards and getting lost.  If you want to
learn more about this method you can type "DotMath for kids" into the
search box and it will help you find the web site.  You can copy the
charts from the site for free if you do not use touch math.  That
means you must not mix any of the DotMath material with touch math.

  After learning "DotMath for kids" a child in the first grade won a
race against an adult in subtraction and the adult had a calculator.

Not all children will do this well but I think it will be of help to
all children.


Owen

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