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submitted 3 months ago by sag@lemm.ee to c/curatedtumblr@sh.itjust.works

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[-] sugar_in_your_tea@sh.itjust.works 2 points 3 months ago* (last edited 3 months ago)

For me:

3974 * 438 -> 4000 * 438 - 26*438 ->
4000 * 438 - 26*440 - 26*2 -> 4000 * 438 - 20*440 - 6*440 - 26*2

And so on, and I'd do some of the intermediate calculations as I go (e.g. 20*440 and 6*440).

But that's only really needed if I need a precise answer. If I can get away with an estimate, I'll simplify it even more:

4000 * 430 ~= 43 * 4 * 10000 = 86 * 2 + 10000 = 1,720,000

Actual answer: 1,740,612. 4000 * 440 would be easier (I like multiplying 4s), but I know it would overshoot, so I round one up and the other down. Close enough for something like estimating how much a large quantity of something kind of expensive would cost (i.e. if my company gave everyone a hot tub or something).

this post was submitted on 18 Oct 2024

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