Timefly wrote:Arithmetic is generally fine as I'm quite handy with a calculator.
z4lis wrote:If you're slow at calculation, you can do what anyone has to do to become faster: practice. Identify what's taking you a long time, make up some problems similar to those, and practice solving them quickly and without errors.
Yakk wrote:Remember when people talked about the harm you do yourself when you rely on your calculator to do Arithmetic? Maybe you don't, but people do talk about it. There is a reason.
Arithmetic is a way to build up a basic working memory and reliability when doing algebraic manipulation. If you do all of your Arithmetic on a calculator, you haven't been practicing doing algebra (on numbers) nearly as long as you would have otherwise.
Try doing all of your arithmetic without a calculator. It will be slower, and less accurate, but you'll get practice at it, and get better at it if you practice it. And the skills transfer: It will give you extra practice at manipulating symbols in algebraic ways.
Xanthir wrote:These trickses can only be developed by long practice - they're very instinctual, and I suspect very idiosyncratic to my brain. You'll develop your own methods. (Or you won't - it's possible that your brain just doesn't like the particular operations that let you do fast mental calculation. We're all different up there.)
Gear wrote:I'm not sure if it would be possible to constantly eat enough chocolate to maintain raptor toxicity without killing oneself.
Xanthir wrote:As a simple example, yesterday I needed to multiply 18 by 12.
Meteoric wrote:You could also do that one as (15+3)(15-3) = 15^2 - 3^2 = 225 - 9 = 216
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