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kescusay@lemmy.world

Struggling with the nine times table? I have a failsafe method (www.theguardian.com)

submitted 1 day ago by Aatube@lemmy.dbzer0.com to c/nottheonion@lemmy.world

33 comments fedilink hide all child comments

Apparently, nines are the hardest to grasp for primary school children. If only they’d learned how to cheat like me, says Adrian Chiles

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[–] WolfLink@sh.itjust.works 0 points 1 day ago (1 children)

If you try to do that for all multiplication you might end up with something like 10*6 = 60 - 6 = 54 - 6 = 48 - 6 = 42 - 6 = 36 and even then the subtractions are going to involve some memorization unless you are counting down or something.

You kinda need to have the basic operations involving the 10 digits in our common number system memorized to then start building algorithms for more complicated problems like multi digit numbers.

[–] givesomefucks@lemmy.world 0 points 1 day ago* (last edited 1 day ago)

you might end up with something

Literally the point I was trying to get thru to people.

The thing is there's a lot of human variation, and if I wrote it out enough for everyone to understand, no one would read it.

So I end up with shit like your reply.

You don't understand the goal, so you don't understand why it's being taught

And after (maybe) reading the other comments, you come in completely sincerely with "just memorize it".

I know you're trying to help, and legitimately don't see the problem here. But fucking come on man, at least ask questions and people may explain it