lolmac: (42)
Beth (the 'Mac' is silent) ([personal profile] lolmac) wrote2010-07-26 12:00 pm
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LOLMathLesson

Extra hugs to [livejournal.com profile] pepper_field for this one!
Now that’s what you call a calculating look.
Math iz fun fer da whole team.
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[identity profile] kirsty841.livejournal.com 2010-07-26 10:40 pm (UTC)(link)
I was always taught to write sums like that with brackets...

[identity profile] dieastra.livejournal.com 2010-07-26 10:50 pm (UTC)(link)
I mean, when you have an x (or / )and an + (or -) in an equation, the x always comes first. So you only need the brackets if you want the + to come first. But since the x comes first anyway, there is no reason to put brackets on. It's like belt and braces.

1+2x3=7 because 2x3=6+1=7

but (1+2)x3=9

And there are many calculators out there which do it wrong if you enter it like in my first equation. But the one I have recognizes that it should do the 2x3 first and then add 1, it does not immediately jump to 3 after the 1+2 but waits for what's coming next.