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Re: Simplifying Algebraic Expressions with Subtracted Expressions
Posted:
Nov 15, 2013 2:42 PM
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R Hansen says:
>What she did was reverse engineer the solution *she* already knew.
She reverse engineered it from the number 400? I doubt it. I wasn't there, but I think a more likely guess is that the hypothetical kid *knew* the process, the steps, of how to get an answer this way.
Cheers,
Joe N
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