Quick backstory - my grandma taught me my time tables at 7 years old, two years before the American school system generally does it. I wasn’t allowed to play outside until I memorized 12 * 12 time tables, and I’m now thankful for this. After I memorized these time tables, I was unable to stop thinking about math for months and/or years (it was a long time ago). I would think about, for example, how 48 * 64 came to be 3,072. Over and over and over again. I played classical guitar from 8 years old, often memorizing five pages of music for recitals. This helped immensely with mental computation as I visualize the numbers being split up as I add them together.
Well my friends encouraged me to find a community like this online to get experiences of people with similar skills. I just hit #1 on the leaderboard of mathtrainer.org which motivated me to come here and ask people as well. I can do 3 * 3 multiplication very quickly, and can divide to multiple decimal places. I’ve done up to 11 before. I mainly do multiplication.
Do any of you use this skill in your career? I have an accounting degree and was into researching trading in college, but never went all into it. Has anyone here done so? Any recommendations?
Thank you in advance. I hope to be a regular on this forum.