When adding a negative isn’t just like subtracting

Posted on January 29, 2017

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Sometimes students resist tackling new content because we’re just making things more complicated than they think necessary.

Why should we say 11 + -8 instead of 11 – 8?

If Ferocious Football Player 1 gains 11 yards, and then LessFerocious Player lost 8… did we *take away* 8 yards from the first guy?  No.   That second guy went backwards.   Both of those things happened going forward in time.

Just thinking.   Now, back to … getting the resume & cover letter together…

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