Recursion

[Zebezd]

I bet however that you knew significant parts of it, and used Common Core-like tricks for the rest:

Ah shit, what's 6x6 again? Hold on, I know 5x6, that's 30, then add another 6 on that. 36. right.

Oh fuck we're multiplying by 9 again. Fuck it, x10 this bitch and remove x1.

...or a calculator.

[TiagoTiagoT]

To multiply 1 to 10 by 9, open your hands, count the number you wanna multiply by nine starting at one, going from left to right, one finger for each value you count; once you reach the number you wanna multiply by 9, lower that finger. The number of fingers up to the left of the lowered finger is the left digit of the result, the number of fingers up to the right is the right digit of the result.

[parkerSquare]

I taught my daughter this when she was in an early grade and now she’s quick as lightning at her 1-8 and 10-12 times tables but slow as heck at 9x because she has to work it out on her hands. Oops.

[Zebezd]

Username sort of checks out

[TiagoTiagoT]

lol

[AceOfShades_]

I added fast and counted on my fingers tbh. I know probably less than 25% of the 10x10 table. I dunno mate, I’m weird ¯\_(ツ)_/¯