We’ve all been stuck needing a calculator and trying to remember back to our fourth grade teacher giving us shortcuts on mental math. Well, when that fails, or you just want to impress someone with your uncanny skills, these abacus cufflinks are always conveniently within reach. Each one is a real and working abacus, and it might take a little internet research time to recall how to use them, but hey, you are already online and isn’t it worth it?
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