Mental Gymnastics

Lainons, I need some help and suggestions. I never memorized my times tables, and now whenever I calculate things, I do so like a computer. I do successive additions and I even go so far as to break up calculations into multiples of 2, because adding 2 numbers is easy. For example: -> 7*9 -> 9 + 9 = 18 -> 9 * 4 = 18 + 18 = 36 -> 9 * 8 = 2 * (9 * 4) = 36 + 36 = 72 -> 72 - 9 = 9 * 7 = 61 + 2 = 63 These kinds of calculations get even more convoluted with larger numbers, as I have some random parts of the tables memorized (i.e. 6 * 6 = 36) and incorporate that into it. Don't even ask how I manage to do division. I wanted to try learning with book attached, but as it turns out, being able to do basic multiplication instantly (recall opposed to calculation) is a requisite. Is there some way to memorize the tables that doesn't involve wrote learning or a 4 year olds singalong song? >flood detected >post discarded :( I have tried to post for the past 15 minutes :(

>>38864 Anon why do you do this? I would just do: >7*9 >Ok i know that 7*10 is 70 so >7*9 = 70 - 9 = 63 or maybe >13*13 >is 13 * 10 + 13 * 3 >130 + i just count 13 * 3 very fast (like 13 -> 26 -> 39 ) I do this for everything, isn't this easier or normal? I never memorized anything. Or maybe is me mixing introvert intuition and thinking, anyway I could never do operations in that way. What comes to you as more natural? I'm curious

>>38864 >Is there some way to memorize the tables that doesn't involve wrote learning Rote* Repetition is important for memorization, so no.

>>38864 Multiples of 9 09 = 1*9 18 = 2*9 27 = 3*9 36 = 4*9 45 = 5*9 54 = 6*9 63 = 7*9 72 = 8*9 81 = 9*9 90 = 10 * 9 Leftmost digit: count up from zero rightmost digit: count down from 9 works for everything up to 10

> Is there some way to memorize the tables that doesn't involve rote learning or a 4 year olds singalong song? Possibly. Can you instantly memorize the whole table at a glance? If not you need to repeat it. Just do some problems. If you work on times table worksheets you can find online for like 30 minutes a day, you’ll probably be done in a week.

>>38864 this seems like something an actual autistic person would do. I just know what 7*9 is, I guess it's memorized but even if not I will just look at it and see 70, then subtract 7 and I have 63. As for 13*13 I see 130 + (13*3)=169. Sometimes I don't know how I get answers, a number comes into my head and then I check it to make sure I'm not wrong.

>>38864 I have that book and the DVD set, yet never finished either. I keep intending to do so. Anyway, it's usually easy to use prime factorization for these kinds of problems. To multiply seven by nine easily, I can turn it into seven times three times three, and from there twenty-one times three, which is very obviously sixty-three. The old halving and doubling algorithm is also easy and simple, and something early computers used.