LL-L "Numeralia" 2009.01.09 (06) [E]

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L O W L A N D S - L - 09 January 2009 - Volume 06
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From: heatherrendall at tiscali.co.uk <heatherrendall at tiscali.co.uk>
Subject: LL-L "Numeralia" 2009.01.09 (02) [E]

from heather Rendall heatherrendall at tiscali.co.uk

Marlou wrote

that blind spot at 7+8 is interesting! Is it commutative, i.e. is 8+7 just
as bad as 7+8? I found as a child that it helped to add the smaller
number to the greater... a little :-)

No. I don't think it was ( I have reprogrammed my thinking so have no
problems now!)  But I did find it interesting that I carried it over to
higher numbers e.g. 17 + 38 but perhaps that is not surprising as I start
addition very 'properly ' i.e. as taught in school by starting to add the
units so I 'see' 17 as 10 + 7  and 38 as 30 + 8: so I add the units together
and add any 10s created thereby to one of the others sets of 10s - in this
case mostly likely the 30

So my brain seems to look at 17 + 38, breaks it down into 10+7 and 30 + 8. I
then add 7 +8 (which I can do now!) and arrive at 15. I hold the 5 visually
in the right hand side of my inner sight and add the 10 to 30 = 40. I then
add the 10 (of 17) and and put it to the left of the figure 5 held in inner
sight and so arrive at 55.

I am sure there must be easier less complicated ways of doing this sum!

I once asked a gifted teenage mathematician how his inner mind worked with
numbers and he seemed to be describing some kind of enormous blackboard with
numbers and patterns of numbers dissolving in and out of sight. He seemed to
have very clear areas where he 'looked' for answers i.e. a complicated
addition and the number/ answer would swim into view in the top right hand
corner.   Does this indicate that computation takes place subliminally? And
the answer is brought up to conscious awareness on this 'blackboard of the
brain"?

Heather

Sorry not very Lowlandish - but I am hoping that those with different number
systems may provide interesting and differing descriptions, which might go
to show that differing number systems produce different methods of
calculation or different visualisation

•

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