I was always terrible at maths in primarey school (6-12 years old) in a transition to highschool I started to understand things, and I became quite good. It was like I was realy bad at rote learning, but I started to learn other tricks that to me gave me short easy ways at doing maths, that to other people may not make much sense. Here is how it goes 2 times tables is double, 3 times tables is two times plus an extra 1 times amount, 4 times is double of 2 times, 5 is a system of halving it and timesing by ten, and 6 is is 5 times plus an extra amount. 7 and 8 I dont have a good system and struggle a bit, and 9s are the number take 1 times 10, then add what number is needed to get to 9 if both were added, ten is just add a zero or move the dot down a bit and 11 is usualy two of the number ie 6=66. I have some good systems in my head to quickly calculate these, and whenever I learn something I usualy look beyond the formulae and find the reason and idea behind the formulae. The way I see the way I remember is like a string of spider webs and the spider links a bunch of smaller information together useing different thickness for the importance something is to another. That is the problems is that I can not put large amounts of one single piece of information up as it feels like it put too much pressure on the threads and can cause me to have "problems". This appears in the fact I do not know any phone numbers, also I find that i work very slowely and I can not learn a raw equition without knowing what each thing means. But I do think that I have this weird thing where I put two of my fingers over the place where my eyebrows meet and for some reason I can get a great burst of mathematical thinking. Kind of like how Shikamaru cuffs his hands together to boost his thinking.
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Through dream I travel, at lantern's call
To consume the flames of a kingdom's fall