leftwinger
Diamond Member
They don't.
With numbers prior to mainstream calculators it was good to become a quick thinker. Like 97*0.23. Uh if it was 100*25 it would be 2500 (divided by 100 or time 0.01) so you know the answer has to less than 25. Call it a quick “smell test”.
Learn to play tricks.
97*0.2 = 97/5 = ~19 + 97*0.03 ugh….3% of 97? 10% is 9.7….gimme calculator, games on.
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