• BlueFootedPetey
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    92 months ago

    No no no. Adding nine is just subtracting one, but adding to the front digit. 9 + 7 is actually 7 - 1=6, then add that 1 to the front. 16. Let’s not make more complicated than it needs to be.

    • @Machinist
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      52 months ago

      Holy shit! That’s how I do it. Caught so much crap for it when I was a kid.