Math hack: Common Core Subtraction Method

This Business Insider video compares the Old Math, New Math and the newest math trick called “Common Core” subtraction method.

Common Core Method

Best regards,
Pedro Calado

3 thoughts on “Math hack: Common Core Subtraction Method

    • Hey abyssbrain, thank you very much for your feedback,

      I was born in 1993 and was taught the Old Math method (pretty simple, but for bigger numbers sometimes you get confused and miss some of the +1 or -1) and thought the Common Core one pretty interesting and with easy to follow steps, working also for division and multiplication (but that doesn’t mean that I’ll start using it from now on, ahah).

      What method do you recommend to use then?

      Best regards,
      Pedro Calado

      Liked by 1 person

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