@BoingBoing Or just take 12 away from 32. That seems a lot easier.
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Thanks. Twitter will use this to make your timeline better. UndoUndo
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@BoingBoing it is what I thought it was.Thanks. Twitter will use this to make your timeline better. UndoUndo
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@BoingBoing yeah not new at all. a lot of street sellers and neighborhood stores compute my change this way. i live in the philippines.Thanks. Twitter will use this to make your timeline better. UndoUndo
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@BoingBoing Math teacher is correct. Subtracting by counting up to "easy" numbers is a common trick used by scientists and stock traders.Thanks. Twitter will use this to make your timeline better. UndoUndo
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@BoingBoing turning subtraction top addition to help students start is not new. Formatting may be new. Concept is old.#AmIRightThanks. Twitter will use this to make your timeline better. UndoUndo
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@boingboing@vpostrel Sorry, but you made this too complicated. 32-12 = 20. If you want to make change, try something else.Thanks. Twitter will use this to make your timeline better. UndoUndo
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@BoingBoing that's just too complicated!Thanks. Twitter will use this to make your timeline better. UndoUndo
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