Teacher2Teacher 
Q&A #107 
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From: Amanda To: Teacher2Teacher Public Discussion Date: 2003100721:07:29 Subject: Re: Using counters to subtract integers I am not sure if this is what you are looking for but if you add a red (positive) and a yellow (negative) to say three positive chips, it does not change the value of the three chips...it is still three. Just letting students know that adding the same number of positive and negative chips to some number of chips will not change, because one positive cancels a negative and vice versa.
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