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Panik (i.postimg.cc)
submitted 2 years ago by to c/lemmyshitpost@lemmy.world
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[–] 44 points 2 years ago* (2 children)

I'd forgotten this trick. It works for large numbers too.

122,300,223÷3 = 40,766, 741

1+2+2+3+2+2+3 = 15

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  • [–] 52 points 2 years ago (2 children)

    threw up and died while reading this

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  • [–] 16 points 2 years ago (1 child)

    I wish I could read 😞

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  • [–] 26 points 2 years ago (1 child)

    The neat part is that if you add the numbers together and they're still too large to tell, you can do it again. In your example, you get 15. If you do it again, you get 6, which isn't the best example because 15 is pretty obvious, but it works.

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  • [–] 8 points 2 years ago (3 children)

    But how do I prove it for 6

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