It never ceases to amaze me the direction a discussion can head from the original post and I thank all whom have taken their time to contribute. I shall certainly be taking some of this new found knowledge and information with me for future use and knowledge sharing...

I'm very much enjoying the banter and the trip down memory lane all the way from BODMAS to BIDMAS and even PEMDAS, is that really a thing? Who would have thought that there were errors in the SI system. I would have thought that the SI System was as flawless as BS7671 & GN8 ;0)

Did someone actually manage to get Trigonometry into the discussion also? Brilliant :0)

I had a lovely Almond Croissant with a Cappuccino this morning whilst delivering my Tech Talk on the omission of supplementary bonding in a location containing a bath or a shower.

The one thing that I shall definitely take away from this and be putting to good use immediately is what Mapj1 typed 'Measure with a micrometre, cut with an axe' love it :0)

I do appreciate all that has been said, I really do, but I still think that the worked example equations (6.2, 6.3 & 6.4) could be written to give better clarity for everyone at all levels.

We don't need to have a copy of Equation (6.1) at the start of each worked example. The wording above the worked examples eludes to the fact that Equation (6.1) is used.

And then the repeat of the equation, but with the bracketed part worked for us, why?!

I've had a go at re-writing it myself after considering all of the comments and would again appreciate your opinions. I've even managed to chuck a couple of comas in...

How complicated can we make Ohms law look! That's not a challenge BTW ;0)

And that is a version I do fully agree with ;-)  Please don't be put off by the way,

in the manner of 'Look what they've done to my post, ma' as Melanie Safka might have sung, but she didn't, quite.

Discussions on here do sometimes do this sort of thing, and it is ( to me at least) this free flow train of thought stuff that makes it interesting-  all of us learn something, even if it is only what  is not obvious to others and maybe how to better explain it.

Further the most innocent questions are often the best at that...

M
PS the measure with micrometer and axe thing is not originally mine but part of a Hewlett Packard application note, though right now the exact one eludes me. - and it might not actually have been HP..

The original was

Measured with a micrometer

Marked out in chalk

Cut with an Ax.

(A spelling I abhor actually but there we go, they are quite a successful former colony....)

PPS PEDMAS is a thing see here

and it seems that  posters are made to hang up on American classroom walls

Yours for 20 dollars plus postage, laminated I presume

And that is a version I do fully agree with ;-)  Please don't be put off by the way,

in the manner of 'Look what they've done to my post, ma' as Melanie Safka might have sung, but she didn't, quite.

Discussions on here do sometimes do this sort of thing, and it is ( to me at least) this free flow train of thought stuff that makes it interesting-  all of us learn something, even if it is only what  is not obvious to others and maybe how to better explain it.

Further the most innocent questions are often the best at that...

M
PS the measure with micrometer and axe thing is not originally mine but part of a Hewlett Packard application note, though right now the exact one eludes me. - and it might not actually have been HP..

The original was

Measured with a micrometer

Marked out in chalk

Cut with an Ax.

(A spelling I abhor actually but there we go, they are quite a successful former colony....)

PPS PEDMAS is a thing see here

and it seems that  posters are made to hang up on American classroom walls

Yours for 20 dollars plus postage, laminated I presume