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MVTutor
Posts:
11
From:
Mountain View, CA
Registered:
11/11/13


Changing Subtractions to Adding Negative Numbers
Posted:
Nov 11, 2013 9:34 PM


Hi, In simplifying algebraic expressions, it seems convenient to change all subtractions to addition of the negative form of the terms. This enables the use of the associative and commutative properties of addition. For example, 2x2x1 becomes 2x+(2)+(x)+(1) Then through commutation, I can get 2x+(x)+(2)+(1)
Is this commonly done or do students have problems with this approach?
Can you suggest other methods?
Thanks, John



