Asklemmy

47550 readers

772 users here now

A loosely moderated place to ask open-ended questions

Search asklemmy 🔍

If your post meets the following criteria, it's welcome here!

Open-ended question
Not offensive: at this point, we do not have the bandwidth to moderate overtly political discussions. Assume best intent and be excellent to each other.
Not regarding using or support for Lemmy: context, see the list of support communities and tools for finding communities below
Not ad nauseam inducing: please make sure it is a question that would be new to most members
An actual topic of discussion

Looking for support?

Looking for a community?

Lemmyverse: community search
sub.rehab: maps old subreddits to fediverse options, marks official as such
!lemmy411@lemmy.ca: a community for finding communities

~Icon~ ~by~ ~@Double_A@discuss.tchncs.de~

founded 6 years ago

MODERATORS

166

What was a fact taught to you in school that has been proven false during your lifetime? (lemmy.ca)

submitted 5 days ago by Kurtagag@lemmy.ca to c/asklemmy@lemmy.ml

220 comments fedilink hide all child comments

you are viewing a single comment's thread
view the rest of the comments

[–] Sonotsugipaa@lemmy.dbzer0.com 4 points 5 days ago* (last edited 5 days ago)

When dealing with base 10 representations, multiplying by 10 is a simple matter of adding zeroes;
dividing numbers that end with a zero by two is (usually) an afterthought;
doing both operations in that sequence is (usually) equally trivial, the only effortful thing I have to do is adding or subtracting a multiplicand, once or twice or thrice.

It's not easier than having the result imprinted in my memory, but it cuts away ~ three quarters of the table.