294
.... Fair
(thelemmy.club)
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this post was submitted on 25 Jun 2026
294 points (97.7% liked)
Funny
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$7.83
My method:
Jesus brother, what the hell
What's the problem with this method? I figure out tips through mental math, without any paper. This is just explaining how I do that mental math
Yeah you did it in the hardest way possible hahaha
Just subtract 17 from 100 to get the cents. 83. There, done. Or at least 100 - 10 - 7
I can't do mental math that easily. I struggle with visualizing it, I think better in multiples of 5, and subtraction is more intuitive to me
Three cents to $42.20
Eighty cents to $43.00
Seven dollars to $50
Seven eighty-three!
Mine:
I think, anyway. I can mostly just look at it and know.
This is how AIs do math
This is how I do mental math. Figuring out (100-15)-2 is a lot easier than 100-17
For me 100-20+3 is easier, but yeah
my method: calculator
I used to do calculators for tips, but noticed my mental acuity slipping. I started calculating tips in my head to keep myself sharp