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what the fuck do these mean? and do they actually do anything?
i've never known.
so you can save values
just get a proper scientific calculator, they're awesome fun
at least till we got till the age of 16 and used calculators for difficult calculations/formulas.
say COCO POPS
we weren't allowed to use them till our Leaving Cert.
Then type .7734 in and tap the shoulder of the girl sat at the desk in front of you. Show them the calculator, upside down. Watch them smile. Press MR.
you didn't know, did YOU
M- takes the value away.
MC cancels the memory and MR recalls it. Useful for storing the results of one calculation to retrieve for a later one or for totally up the values from a series of calculations.
My last calculator (bought in 1997) has six extra memories for more fun.
M = memory,
M+ saves numbers so that they can be recalled (MR) in subsequent calculations, and M- clears the memory
Rather than actually meaning to write that.
If you put 9 M+ and then 9 M- yeah it would mean the memory goes away but otherwise it shouldn't work that way.
i've never used basic calculators for more than adding/multplying/dividing and i've never had need to use those M buttons. and no one has ever told me what they were.
especially as one of the people is Theo, and obviously he would effing know.
Everyone who's ever used a calculator knows, apart from you and a few luddite grannies.
I just didn't bother replying to the thread, because... well, y'know.
Worst sign off to Sarah you can really do? :D
i've never used them, ever.
And I'd forgotten the specifics until reading Theos post.
It is known to me.
and still don't get why these buttons are needed.
I have to do the square of one side of a right angle triangle and the square of the other side and then add them together and get the root of that.
Early calculators didn't have bracketing and also may not even have been able to perform basic multiply/divide/addition/subtraction in the right order so if you tried to do:
(side length x side length) + (other side length x other side length)
the only way you could do it was to store the first calculation in the memory and then do the other one and add it to the memory value before doing the square root.
Something like that.
we had to do that on paper, all written out.
so i've never had need to use those buttons.
and now all i use them for are basic calculations!
And I'd rather have a way to check my calculations are right if I'm doing a scientific experiment that relies on several values.
i probably knew some formula to figure that out.
and when i was allowed a real proper calculator, it had the specific 'square root' button so...
A + B
where A = the result of some long and laborious calculation that runs to eight digits and B = the result of another long and laborious calculation that runs to eight digits.
Do you write them all out on a piece of scrap paper? It’s a lot easier to press M+ and then MR when needed.
If you have you (Casio?) calculator in SD (standard deviation, i.e. stats mode), you can bung a sequence of numbers into the memory and then use summats like S-VAR to get the variance of those numbers. You can also retrieve other statistical data from that sequence.
Exact details are flaky. It's been over 10 years since I used that shizzle for A-Level Maffs/Phyzix.
And if you don't know what RTFM is, Google it, innit?
I don't have my calculator with me to double check either.
so, like fuck you mr. knowitall
I don't know if that means it's universal on all calculators but I knew what the fuck M was, doofus.
AC = All Clear. This clears all numbers and functions.
C (or CE) just clears the most recent input.
So, for example, if you wanted to calculate 4+5+6+7 (22), and you accidentally typed, ‘4+5+6+8’, you could press C and it would clear the ‘8’, allowing you to enter the ‘7’ and continue. It just means that you don’t have to go all the way through a lengthy calculation if you make a typo.
And ‘Min’ wipes the memory.
Thinking about it, I’ve used calculators which had M- on them in lieu of Min and it required a double press to clear the memory, which would suggest that Theo is right, as it was subtracting itself equalling zero.
Just wow, Sarah.
On the topic of calculators, I have one that I need to get rid of, it draws graphs in 3 different colours and allsorts of other stuff for use in further maths.
Anyone obsessed with maths and stuff want to buy it? It's a long shot, but you know.