• pyre@lemmy.worldEnglish
    182·
    2 days ago

    not even ADHD related you’re just taking a route to something more readily available in your memory. that’s how brains are supposed to work.

    to me the detour is -1+10. whenever i see a 9 i take 1 away from the other guy and then add 10.

    9 x single digit mumber works similarly; except i take away 1 and complete that to 9 by adding a number next to it.

    9x7 = ?

    7-1 = 6

    6+? = 9

    9x7 = 63

    • Labna@lemmy.worldEnglish
      1·
      2 days ago

      9x7 = 70 - 7 = 63 in table of 9 too easy ! (nearly the same technic)
      8x7 = 70 - 7x2 = 70 - 14 = 6 + 70 - 20 = 56 (6 from 10-4 from 14)

      7x6 = 5x7 + 7 = 70/2 +7 = 35 + 7 = 42 the answer to the life, the death and all the rest (5xa = 10/2 x a= 10a/2)

      • pyre@lemmy.worldEnglish
        1·
        2 days ago

        i mentioned the 5x trick elsewhere under this post but for me for some reason doing the halfing first is easier. so to me it’s a/2x10 instead.