When adding a negative isn’t just like subtracting

Posted on January 29, 2017


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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