- Which of the following "tricks" was helpful to you in learning and understanding what was going on?
- Which ones just got you confused when the problem changed form slightly?
- Did you ever confuse $\dfrac{3}{5}x\dfrac{1}{5}$ with $\dfrac{3}{5} = \dfrac{x}{5}$ with $\dfrac{3}{5} + \dfrac{1}{4}$?

Which "tricks" should teachers stop using?

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