E
EddieM
I've known a 15 into a 25.
But how the hell unside down? he must have used a big hammer.
No, he got it in by hand, how, I don't know, needless to say we couldn't get it out again.
I've known a 15 into a 25.
But how the hell unside down? he must have used a big hammer.
And they were both the same size?No, he got it in by hand, how, I don't know, needless to say we couldn't get it out again.
And they were both the same size?
That doesn't make any sense
True, but I'm not sure how 'PC' (even 'legal'), let alone fair or reasonable, to describe people who have genuine problems with grasping mathematical concepts as being either "stupid" or "idiots".Can't fix stupid, nor can you make things idiot proof, coz they'll always out idiot any proofness.
30ma and 100ma always fool meDon't panic - you didn't (get it wrong)
Maths is a strange subject, in that a good few people seem to have problems in understanding concepts which others regard as "simple, basic and 'obvious' ". If I understand the OP's problem correctly, it's not all that uncommon, and tends to arise in those who would read/pronounce 0.12 and 0.8 as "nought point twelve" and "nought point 8" respectively.
As someone said early on, things usually become clearer to some people if one describes both numbers in terms of the same number of decimal places - they would then become 0.12 and 0.80, which might be verbalised as "nought point twelve" and "nought point eighty" - which would make the relative sizes more obvious.
Kind Regards, John
I don't think I can help you with that one unless you can help me understand what it is about them which 'fools' you - since you obviously must understand the difference between "30" and "100"!30ma and 100ma always fool me
Its when it goes subZeroI don't think I can help you with that one unless you can help me understand what it is about them which 'fools' you - since you obviously must understand the difference between "30" and "100"!
Kind Regards, John
I've just finished a Zoom meeting where I mentioned this. One of the others reckons it's not unknown with high density [such as 15pin VGA] where only one pin doesn't have a place to go.What? socket and plug? If so yes, it's impossible right? but he managed it.
I've heard an explanation that this started with shopkeepers when mechanical tills were introduced to stop assistants pocketing customers payments, this way the till could be heard to open to get the change.True, but I'm not sure how 'PC' (even 'legal'), let alone fair or reasonable, to describe people who have genuine problems with grasping mathematical concepts as being either "stupid" or "idiots".
Given that such people exist, whilst complete 'xxx-proofness' is obviously not possible, one can at least do what one can to minimise issues resulting from the fact that some people do have this problem (which some might call a 'disability'). For example, on the basis of my experience, whilst I could not have quantified the problem for them, I could have told these purveyors of burgers that the 'first impression' ('intuitive', albeit incorrect!) of an 'appreciable' proportion of people would be that a 1/3 lb burger was smaller than a 1/4 lb one!
However, even for those who 'understand' the maths, there is, in practice, another level of complication resulting from the psychology of perception. For example, although it has been the subject of an awful lot of research, and therefore presumably must be at least partially true, I find it quite surprising that (seemingly 'for ever'**) marketeers have believed that, despite all the 9s, a price of, say, £499.99 is perceived as being significantly less than £500.00.
[** even if you look back at adverts from the 19th or early 20th century, you will see lots of goods on offer for prices like "£2 19s 11¾d" ]
Kind Regards, John
Fair enough - although that is not 'sub-zero' (which would mean 'negative') but, rather, 'sub-1' or 'subb-unity' (i.e. 'less than 1').Its when it goes subZero. 30ma and 100ma ,which trips first, 0.030A or 0.100A, something so simple but gets me everytime
I suppose a credible story at the time, but not really still applicable - yet, if you look anywhere today, you'll find an incredible number of products priced at just one pence (or, in the case of large items, like cars and houses, just one pound) under a 'very round number' !I've heard an explanation that this started with shopkeepers when mechanical tills were introduced to stop assistants pocketing customers payments, this way the till could be heard to open to get the change.
Yes, and with a previous hat on, one of the tasks I once got asked to do was a script to calculate prices to be applied to products based on "cost price + markup, and apply rounding to standard prices" - so 99p, £1.49, £1.99, and so on.I suppose a credible story at the time, but not really still applicable - yet, if you look anywhere today, you'll find an incredible number of products priced at just one pence (or, in the case of large items, like cars and houses, just one pound) under a 'very round number' !
Had a lecturer at uni like that. He was a mathematician teaching mathematics (partial differential equations IIRC) as an end in itself to engineers - who almost all of us couldn't grasp something like that without it having "real world" application. Needless to say, nearly all of us struggled with that oneOne of the structural problems with maths education is that if you're successful at maths, ... you therefore have little idea or understanding whatsoever what it's like not to be good at maths, what it's like not to 'get it' and may therefore be a fairly rubbish maths teacher for most people.
F
Furthermore, sticking with integers is much 'safer', particularly when the bit to the left of the decimal point is something other than zero, since decimal points can sometimes be overlooked, or not 'seen to be in the right place'. That is one reason why, for example, modern practice with drug doses is avoid fractions (decimal or otherwise) wherever possible - there have been occasions in the past when, say, "1.2 g" has been misread as "12 g" (or vice versa), an error much less likely to occur if the former dose is expressed as 1,200 mg.
Kind Regards, John
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