Comment on this one goes out to the arts & humanities
KevonLooney@lemm.ee 7 months agoWell you should memorize those anyway. It’s useful all your life for easy calculation. If you want 7 items and they cost $3.50 each, it’s between $21 and $28.
Comment on this one goes out to the arts & humanities
KevonLooney@lemm.ee 7 months agoWell you should memorize those anyway. It’s useful all your life for easy calculation. If you want 7 items and they cost $3.50 each, it’s between $21 and $28.
NounsAndWords@lemmy.world 7 months ago
I check on the calculator I have with me at all times. It’s $24.50
exocrinous@startrek.website 7 months ago
I calculated it in my head without memorising all the multiplication tables. I just realised that 73.5 is equal to (75+7*2)/2. And that 49/2 is equal to 40/2+9/2. Easy peasy. This is why I failed second grade math, because multiplication tables are only useful for doing operations a few seconds faster.
RarePossum@programming.dev 7 months ago
There’s a much easier way.
7x3.5 is the same as 7x3 plus half of 7. That’s 21 plus 3.5 is 24.5
The funny thing is you did this for the division when you could do it for the entire thing.
KevonLooney@lemm.ee 7 months ago
Yeah but that doesn’t work when you need it most on “The Price is Right”.