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Why do people keep getting this wrong‽
About this video
Matt Parker of Stand-up Maths explains why people keep making the same mistake with millions and billions, using a Bloomberg cash calculator example. He looks at the unit slip behind the repeated arithmetic error.
Why it appears in the archive
HN links it to explain why people repeatedly get large-number arithmetic wrong in discussions of money and mental math.
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From the Hacker News discussion
This mistake is so interesting to me. Here's a great explanation of what's probably happening: [VIDEO] tl;dr: mentally we take off "millions" as a unit, do the calculation, then add "millions" back on. This works for addition, subtraction, and inequality but fails for multiplication and division.
Read original comment ↗Matt Parker made a video that tries to explain how people keep getting this basic arithmetic completely wrong. [VIDEO]
Read original comment ↗I'm not sure that there's a name for that kind of maths error, but there is a reason why people keep making it, as Matt Parker discusses: [VIDEO] .
Read original comment ↗Reminds me of this classic: [LINK] “Bloomberg spent $500 million on ads. The U.S. population is 327 million. He could have given each American $1 million and still have money left over.” [VIDEO]
Read original comment ↗